阅读说明：本技术 基于电活性氟化共聚物的可交联组合物 (Cross-linkable composition based on electroactive fluorinated copolymers ) 是由 F.多明格斯多斯桑托斯 M.伊达尔戈 T.苏莱斯汀 于 2018-04-12 设计创作，主要内容包括：本发明涉及基于电活性氟化共聚物的可交联组合物,由这种组合物获得的交联膜,以及制备所述膜的方法。本发明还涉及所述膜在各种(光)电子装置(即压电、铁电、热电装置)中作为介电层的用途。(The present invention relates to the cross-linkable composition based on electroactive fluorinated copolymers, the cross linking membrane obtained by this composition, and the method for preparing the film.Purposes the invention further relates to the film in various (light) electronic devices (i.e. piezoelectricity, ferroelectricity, thermoelectric device) as dielectric layer.)

1. cross-linkable composition, it includes:

A) at least one electroactive fluorinated copolymers,

B) at least one is bifunctional or polyfunctional (methyl) acrylic monomer in terms of reactive double bond,

C) at least one radical polymerization initiator,

D) at least one organic solvent, and

E) at least one additive selected from following list: being (methyl) acrylic compounds list of simple function in terms of reactive double bond Body changes reagent, filler and the nanofiller of surface tension, rheological characteristic, resistance to ag(e)ing, adhesiveness or color.

2. composition according to claim 1, wherein the electroactive fluorinated copolymers are being total to for general formula P (VDF-TrFE) Polymers, wherein VDF represents the unit derived from vinylidene fluoride and TrFE represents the unit for being derived from trifluoro-ethylene, polymer In VDF:TrFE molar ratio be 50:50 to 85:15.

3. composition according to claim 1, wherein the electroactive fluorinated copolymers are general formula P (VDF-TrFE-X) Terpolymer, wherein VDF represents the unit for being derived from vinylidene fluoride, and TrFE represents the unit for being derived from trifluoro-ethylene, and And X represents the unit derived from the Third monomer at least one fluorine atom, it can be in particular selected from: tetrafluoroethene, chlorine fluorine Ethylene, chlorotrifluoroethylene, hexafluoropropene, 3,3,3- trifluoro propene, 1,3,3,3- tetrafluoropropene (or 1234ze), 2,3,3,3- tetra- The chloro- 2,3,3- trifluoro propene (or 1233yf) of fluoropropene (or 1234yf), 3-, the chloro- 3,3,3- trifluoro propene (or 1233xd) of 2-, Hexafluoro-isobutene, perfluorobutyl ethylene, pentafluoropropene and its mixture.

4. composition according to claim 3, wherein the molar ratio of the X unit in polymer is 0.1% to 15%, excellent 0.5% to 13% is selected, and particularly preferably 1% to 12%.

5. according to claim 1 to composition described in one in 4, wherein being difunctionality or more officials in terms of reactive double bond Can (methyl) acrylic monomer be the reactive double bond containing at least two (methyl) acrylic-types monomer or Oligomer, or selected from glycol, triol or polyalcohol, polyester, ether, polyethers, polyurethanes, epoxides, cyanurate or Bifunctional or polyfunctional (methyl) acrylic monomer or oligomer of isocyanuric acid ester.

6. composition according to claim 5, wherein (methyl) acrylic monomer is selected from following list: dodecane Dimethylacrylate, 1,3 butylene glycol two (methyl) acrylate, butanediol two (methyl) acrylate, 1,6-HD two (methyl) acrylate, alkoxylate hexylene glycol two (methyl) acrylate, alkoxylate neopentyl glycol two (methyl) acrylic acid Ester, dodecyl two (methyl) acrylate, cyclohexanedimethanol two (methyl) acrylate, diethylene glycol two (methyl) propylene Acid esters, dipropylene glycol two (methyl) acrylate, linear paraffin two (methyl) acrylate, Ethoxylated bisphenol A bis- (methyl) Acrylate, ethylene glycol two (methyl) acrylate, neopentyl glycol two (methyl) acrylate, two propylene of Tricyclodecane Dimethanol Acid esters, triethylene glycol two (methyl) acrylate, tetraethylene glycol two (methyl) acrylate, tripropylene glycol two (methyl) acrylic acid Ester, two trimethylolpropane four (methyl) acrylate, ethoxylation pentaerythrite four (methyl) acrylate, dipentaerythritol Five (methyl) acrylate, five (methyl) acrylate, pentaerythrite four (methyl) acrylate, ethoxylation trihydroxy methyl third Alkane three (methyl) acrylate, oxyalkylated trihydroxy methyl-propane three (methyl) acrylate, trimethylolpropane tris (methyl) Acrylate, pentaerythrite three (methyl) acrylate, propoxylation trimethylolpropane tris (methyl) acrylate, three hydroxyl first Base propane trimethyl acrylic ester, dodecanediol two (methyl) acrylate, dodecane two (methyl) acrylate, two seasons penta Tetrol five/six (methyl) acrylate, pentaerythrite four (methyl) acrylate, two trimethylolpropane four (methyl) acrylic acid Ester, propoxylated glyceryl three (methyl) acrylate, propoxylated glyceryl three (methyl) acrylate, three (2- ethoxys) Isocyanuric acid ester three (methyl) acrylate, polyester (methyl) acrylate, polyethers (methyl) acrylate, polyethylene glycol (first Base) acrylate, polypropylene glycol (methyl) acrylate, polyurethanes (methyl) acrylate, epoxy group (methyl) third Olefin(e) acid ester with and combinations thereof.

7. according to claim 1 to composition described in one in 6, wherein the solvent is selected from: ketone, furans, ester, carbonic acid Ester, amide and sulfoxide.

8. according to claim 1 to composition described in one in 7, wherein the radical polymerization initiator is selected from 2- hydroxyl Base-2- methyl-1-phenyl propyl- 1- ketone, 2,4,6- trimethylbenzoy-dipheny phosphine oxide, 2,4,6- trimethylbenzoyl Base phenyl phosphinic acid ester, 1- hydroxycyclohexylphenylketone, bis- (2,6- Dimethoxybenzoyl) -2,4,4- tri-methyl-amyl oxygen Change phosphine, 1- [4- (2- hydroxyl-oxethyl) phenyl] -2- hydroxy-2-methyl -1- propyl- 1- ketone, 2,2- dimethoxy -1,2- diphenyl Second-1- ketone and 2- methyl-1-[4- (methyl mercapto) phenyl]-2- morpholino propyl- 1- ketone, 2,4- diethyl thioxanthone, its derivative And its mixture.

9. according to claim 1 to composition described in one in 8, in which:

I. the 60 weight % to 99.99 weights of sum composed by the weight of electroactive fluorinated copolymers (a) constituent component (a) and (b) %, and preferably 70 weight % to 99 weight % are measured,

Ii. the 0.1 weight % to 10 weights of sum composed by the weight of radical initiator (c) constituent component (a), (b) and (c) %, and preferably 0.2 weight % to 5 weight % are measured,

Iii. additive (e) constitutes the 0.01 weight % to less than 20 weight % of composition weight.

10. cross linking membrane comprising at least one electroactive fluorination noncrosslinking according to one in claim 2 to 4 Copolymer and it is a kind of by make (methyl) acrylic monomer defined by one in claim 5 and 6 be crosslinked and obtain (methyl) acrylic copolymer of crosslinking.

11. the method for preparing cross linking membrane, which comprises

It provides according to claim 1 to cross-linkable composition described in one in 9, wherein by the component (a), (b), (c) (e) it is dissolved in the solvent (d) to obtain ink,

The ink is deposited on (light) electronic device, in a part of device or on supporter to form film,

The film is dried by partly or entirely evaporating solvent, and

It is crosslinked all or part of the film by the polymerization of (methyl) acrylic monomer,

In the case where desirably forming predetermined pattern, make the film development to remove uncrosslinked part.

12. according to the method for claim 11, wherein the radical initiator is can be by partly or entirely by wavelength The photoinitiator of the photoactivation of 150 to 410nm spectrum cross section composition.

13. method described in one in 1 and 12 according to claim 1, wherein for causing the irradiation dose of the crosslinking of film small In 20J/cm², and preferably smaller than 10J/cm²。

(14. light) electronic device comprising method preparation described at least one layer of one in 1 to 13 according to claim 1 Film is as dielectric layer.

15. device according to claim 14 comprising be deposited on the stacking of one or more layers on the layer of film Body.

16. device described in one in 4 and 15 according to claim 1, is selected from field effect transistor and ferroelectric memory, It can be particularly used for the organic electronic product of printing.

17. device described in one in 4 or 15 according to claim 1, is selected from actuator, haptic device, capacitor, two poles Pipe, sensor and electromechanical micro-system.

Technical field

The present invention relates to the cross-linkable composition based on electroactive fluorinated copolymers, the crosslinking obtained by this composition Film, and the method for preparing these films.The invention further relates to the films in following various (light) electronic devices as electroactive The purposes of layer: piezoelectricity, ferroelectricity, thermoelectricity, actuator or haptic device, sensor, field effect transistor, ferroelectric memory or electromechanics Micro-system.

Background technique

" electroactive polymer " or EAP are the polymer that can convert mechanical energy or thermal energy to electricity or vice versa.In There are the fluorinated copolymers based on vinylidene fluoride (VDF) and trifluoro-ethylene (TrFE) in these materials, optionally including Three monomers such as chlorotrifluoroethylene (CTFE) or chlorine vinyl fluoride (CFE).

These polymer are formed by " ink " formulation as film, the formulation include electroactive fluorinated copolymers and The optionally solution of other additives in a solvent.During preparing electro-active apparatus, it may be necessary to according to scheduled pattern Part or all for making film is insoluble.This is mainly due to electroactive fluorinated copolymers film merely comprise whole device a layer this The fact that sample.Therefore, it can be necessary to which other layers wait be laid in electroactive fluorinated copolymerizable nitride layer are deposited by solvent route On the top, wherein if electroactive fluorinated copolymers are not crosslinked, risk is that it can be deposited layer on top of this Present in solvent portion or be completely dissolved (and therefore degrade).

Therefore, in order to form electroactive copolymer layer in electro-active apparatus, the fluoropolymer for needing to be crosslinked.

Document WO 2015/128337 describes cross-linking comprising electroactive fluoropolymer and acrylic crosslinking agent Composition.The fluoropolymer (polymer (FC)) is derived from least one functionalized hydrogenation comprising side chain due to existing Monomer (monomer H'_F) repetitive unit but it is crosslinkable, the side chain includes unsaturated ether type end group.It is described herein can Cross-linked composition by there are these cross-linking fluoropolymers but be crosslinked.

Document WO 2013/087500 also illustrates the monomer and VDF and TrFE by the inclusion of azide (nitrine) group The copolymerization of base monomer and become crosslinkable VDF-TrFE fluorinated copolymers, the thus obtained fluorinated copolymers can pass through Heat radiates crosslinking by UV.

Another solution is proposed in document US 6 680 357, this document describe comprising being based on VDF and six The cross-linkable composition of the acrylic acid modified copolymer of fluoropropene (HFP), the copolymer are by the fluorinated copolymers It is obtained with polymerizeing for acrylic monomer.

In these cases, it is necessary to chemical modification be carried out to electroactive fluorinated copolymers in advance, this is to prepare cross-linked polymeric The method of object increases step, wherein there is the risk for the initial performance quality for reducing electroactive fluorinated copolymers.

Other strategies provide by free radical approach (peroxide) or by with diamine reactant, or pass through electron beam Or it is crosslinked electroactive fluorinated copolymers directly by X-ray；However, the disadvantage is that often being carried out to electroactive fluorinated copolymers Chemically undesirable modification, this can lead to the loss of its property.

It is therefore desirable to have a kind of available electroactive fluorinated copolymers, are including holding after its composition crosslinking Its electroactive properties, especially its dielectric constant or polarization (polarity) and its engineering properties, thus at it in (light) electronics dress There is provided optimum performance during the use set, this without these fluoropolymer self-crosslinkings, or by with may make up for handing over Join the copolymerization with the comonomer of reactive repetitive unit and become cross-linking, or is produced on polymer by chemical modification It is raw that there is reactive site for crosslinking and become cross-linking.

Summary of the invention

The first purpose of the invention is to provide a kind of cross-linkable compositions, and it includes (or being made up of):

A) at least one electroactive fluorinated copolymers,

B) at least one is bifunctional or polyfunctional (methyl) acrylic monomer in terms of reactive double bond,

C) at least one radical polymerization initiator,

D) at least one organic solvent, and

E) at least one additive selected from following list: being other (methyl) third of simple function in terms of reactive double bond Alkene acrylic monomer changes reagent, filler and the nanofiller of surface tension, rheological characteristic, resistance to ag(e)ing, adhesiveness or color.

According to an embodiment, the electroactive fluorinated copolymers are the copolymers of general formula P (VDF-TrFE), wherein VDF represents the unit derived from vinylidene fluoride and TrFE represents the unit for being derived from trifluoro-ethylene.

According to an embodiment, the molar ratio of the VDF unit in polymer and TrFE unit is 50:50 to 85:15.

According to an embodiment, the electroactive fluorinated copolymers are the terpolymers of general formula P (VDF-TrFE-X), Wherein VDF represents the unit for being derived from vinylidene fluoride, and TrFE represents the unit for being derived from trifluoro-ethylene, and X is represented and derived The unit of the Third monomer of at least one fluorine atom is come with, it can be in particular selected from tetrafluoroethene (TFE), chlorine vinyl fluoride (CFE), chlorotrifluoroethylene (CTFE), hexafluoropropene (HFP), 3,3,3- trifluoro propene, 1,3,3,3- tetrafluoropropene (or 1234ze), the chloro- 2,3,3- trifluoro propene (or 1233yf) of 2,3,3,3- tetrafluoropropene (or 1234yf), 3-, the chloro- 3,3,3- of 2- Trifluoro propene (or 1233xd), hexafluoro-isobutene, perfluorobutyl ethylene, pentafluoropropene and its mixture.Preferably, work as presence When, the Third monomer is selected from CFE and CTFE.

According to an embodiment, the molar ratio of the X unit in polymer be 0.1% to 15%, preferably 0.5% to 13%, and particularly preferably 1% to 12%.

In terms of reactive double bond be difunctionality or polyfunctional described (methyl) acrylic monomer can for difunctionality or Polyfunctional (methyl) acrylic monomer or oligomer.The monomer used in the present invention, can be mentioned that containing at least two The monomer and oligomer of the reactive double bond of (methyl) acrylic-type.

Another theme of the invention is related to (methyl) acrylic copolymer comprising electroactive fluorinated copolymers and crosslinking The cross linking membrane (or the cross linking membrane being made of (methyl) acrylic copolymer of electroactive fluorinated copolymers and crosslinking) of object, it is described Film is obtained by cross-linkable composition according to the present invention.It is characterized in that, the fluorinated copolymers are not crosslinked, therefore being maintained at Aspect is learned both to be modified not over may make up for being crosslinked the comonomer with reactive repetitive unit, Generate on polymer not over chemical modification has reactive site and is modified for crosslinking.

It is a further object to provide a kind of methods for preparing the cross linking membrane, which comprises

Cross-linkable composition according to the present invention is provided, as described above, wherein by the component (a), (b) and (c) and (e) it is dissolved in the solvent (d) to obtain ink,

The ink is deposited on (light) electronic device, in a part of device or on supporter to form film,

The film is dried by partly or entirely evaporating solvent, and

According to predetermined pattern, it is crosslinked all or part of the film by the polymerization of (methyl) acrylic monomer,

In the case where desirably forming predetermined pattern, make the film development to remove uncrosslinked part.

The invention further relates to (light) electronic devices comprising at least one layer of film according to above method preparation is as electroactive Layer.

The invention enables can overcome the prior art.Particularly, the invention enables available wherein electroactive polymerizations Object keeps unmodified cross linking membrane, because form cross-linked network is polymerize and be crosslinked after radical initiator activation (methyl) acrylate moiety.As a result, and in the case where this does not constitute limitation of the invention, it is believed that film according to the present invention Network including two kinds of polymer (fluorinated and (methyl) acrylic compounds), referred to as semi-intercrossing network or half IPN, wherein being fluorinated Component is not crosslinked, therefore from the perspective of electrical property, and fluorinated component holding is relatively unaffected.(methyl) acrylic acid Network itself is crosslinking, and provides the solvent resistance of assembly.In other words, the present invention provides a kind of cross linking membrane, Comprising the cross-linked network of acrylic compounds in noncrosslinking fluoropolymer objects system, the two systems are independent in chemistry. Unexpectedly, the acrylic polymer system of noncrosslinking fluoropolymer/crosslinking of this mixing can get resistance to Solvent nature.The strategy allows the layer heap by (light) electronic device to be stacked on the top of the layer comprising electroactive fluorinated copolymers, And the solvent of these mew layers does not dissolve or the layer for electroactive fluorinated copolymers of degrading.The strategy, which also can produce, to be used to prepare again The predetermined pattern of the electroactive fluorinated copolymerizable nitride layer of miscellaneous (light) electronic device.

The use for the electroactive fluorinated copolymers being made of VDF, TrFE and the optional Third monomer with fluorine atom can Optimize the electroactive properties of copolymer.Specifically, these electroactive properties, which come from, has a large amount of strong polarized carbon-fluorine (C-F) Key, that is to say, that electron density deviates significantly on fluorine atom.It is used without the monomer of fluorine atom, such as (methyl) third Alkene acrylic monomer, such as (methyl) acrylic acid carry out synthesis of electroactive fluorinated copolymers, reduce along C-F existing for polymer chain The number of key.Therefore, it is contemplated that electroactive properties reduce.

In addition, there is sizable advantage for the use of generating pattern (patterning) using UV photo-initiated crosslinking, because optional Selecting property some regions are irradiated so that it is crosslinked and keeps its insoluble, and other regions are quite different.Then handled with developer solution (solvent etching) to can dissolve non-irradiated part, to generate pattern.

In addition, compared with azide chemistry, such as in application WO 2013/087500, to obtain the required UV agent of crosslinking Amount is lower than UV dosage needed for two-fold nitride.This reduces the property that can avoid the multi-layered devices containing photosensitive layer.

Detailed description of the invention

Fig. 1 shows use 2- butanone as solvent and use P (VDF-TrFE) copolymer as electroactive fluorinated copolymerizable Object, by the infrared spectrogram for the film that formulation 0 (bottom, solid line) and 7 (top, dotted lines) are formed.

Fig. 2 expression uses 2- butanone as solvent and uses P (VDF-TrFE-CTFE) copolymer as electroactive fluorination Copolymer, by the infrared spectrogram of the film formed with glove 0 (bottom, solid line) and 7 (top, dotted lines).

Specific embodiment

Now will the present invention will be described in more detail in the following description, without limit.

Present invention solves the technical problem that including, after placing it on supporter or device, it is necessary to make electroactive Fluorinated copolymerizable nitride layer (film) (it is used to prepare certain (light) electronic devices) is insensitive to the erosion of certain solvents, with prevent its It dissolves or degrades during depositing other organic or inorganic layers by solvent route, the organic or inorganic layer is a part of device And it is deposited after depositing electroactive fluorinated copolymerizable nitride layer.Another technical problem that the present invention solves be in supporter or Pattern is generated on the surface of electroactive fluorinated copolymers film on device after deposition.These problems are handed over by described below Join composition to solve.

According in a first aspect, the present invention relates to a kind of cross-linkable composition, it includes:

A) at least one electroactive fluorinated copolymers,

B) at least one is bifunctional or polyfunctional (methyl) acrylic monomer in terms of reactive double bond,

C) at least one radical polymerization initiator,

D) at least one organic solvent, and

E) at least one additive selected from following list: being other (methyl) third of simple function in terms of reactive double bond Alkene acrylic monomer changes reagent, filler and the nanofiller of surface tension, rheological characteristic, resistance to ag(e)ing, adhesiveness or color.

According to an embodiment, the electroactive fluorinated copolymers are the copolymers of general formula P (VDF-TrFE), wherein VDF represents the unit derived from vinylidene fluoride and TrFE represents the unit for being derived from trifluoro-ethylene.

According to an embodiment, the molar ratio of the VDF unit in polymer and TrFE unit is 50:50 to 85:15.

According to an embodiment, the electroactive fluorinated copolymers are the terpolymers of general formula P (VDF-TrFE-X), Wherein VDF represents the unit for being derived from vinylidene fluoride, and TrFE represents the unit for being derived from trifluoro-ethylene, and X is represented and derived The unit of the Third monomer of at least one fluorine atom is come with, it can be in particular selected from: tetrafluoroethene (TFE), chlorine vinyl fluoride (CFE), chlorotrifluoroethylene (CTFE), hexafluoropropene (HFP), 3,3,3- trifluoro propene, 1,3,3,3- tetrafluoropropene (or 1234ze), the chloro- 2,3,3- trifluoro propene (or 1233yf) of 2,3,3,3- tetrafluoropropene (or 1234yf), 3-, the chloro- 3,3,3- of 2- Trifluoro propene (or 1233xd), hexafluoro-isobutene, perfluorobutyl ethylene, pentafluoropropene and its mixture.Preferably, work as presence When, the Third monomer is selected from CFE and CTFE.

According to an embodiment, the molar ratio of the X unit in polymer be 0.1% to 15%, preferably 0.5% to 13%, and particularly preferably 1% to 12%.

Electroactive fluorinated copolymers (a) can be homogenously or inhomogenously or homogeneous and heterogeneous copolymer mixture. Matter polymer has uniform chain structure, and the statistical distribution of comonomer does not change between polymer chains.Heterogeneous total In polymers, polymer chain has the distribution of the average comonomer content of multimodal or dispersal type: therefore, it includes single rich in copolymerization The polymer chain of body and the polymer chain for lacking the comonomer.The example of heterogeneous PVDF is found in document WO 2007/ 080338。

Although any of method can be used, such as emulsion polymerization, suspension polymerisation and polymerisation in solution prepare P (VDF- TrFE) and P (VDF-TrFE-X) polymer, it is preferred that using method described in WO 2010/116105.This method makes It can get the polymer of high molecular weight and appropriate configuration.

In brief, prepare the preferred method of P (VDF-TrFE-X) polymer the following steps are included:

The original mixture (no X) of VDF and TrFE is encased in the autoclave of the stirring containing water；

Autoclave is heated to the predetermined temperature close to polymerization temperature；

The radical polymerization initiator mixed with water is injected into autoclave, so that the pressure in autoclave reaches excellent At least 80bar is selected, to form the suspension of VDF and TrFE monomer in water；

The second mixture of VDF, TrFE and X are injected into autoclave；

Second mixture at the beginning, is just continuously injected into autoclave reactor, pressure is protected by polymerization reaction It holds in a substantially constant level, preferably at least 80bar.

Radical polymerization initiator can be organic peroxide, such as peroxydicarbonate.It is usually total single with every kilogram Body charging meter, 0.1 to 10g amount use.Dosage is preferably 0.5 to 5g/kg.

Original mixture advantageously only includes VDF and TrFE, and ratio is equal to the ratio of desired final polymer.

Second mixture advantageously has the composition through adjusting, and the composition is so that total group of the monomer being introduced into autoclave At the composition for being equal or approximately equal to desired final polymer (including original mixture and the second mixture).

The weight ratio of second mixture and original mixture is preferably 0.5 to 2, more preferable 0.8 to 1.6.

Implementing this method with original mixture and the second mixture makes this method independently of reaction initiating stage, usually It is uncertain.Thus obtained polymer is the form of powder, is not formed a scab or skinning.

Pressure in autoclave reactor is preferably 80 to 110bar, and temperature preferably remains in 40 DEG C to 60 DEG C of water It is flat.

Second mixture is continuously injected into autoclave.It before being injected into autoclave, can be compressed, such as make With a compressor or two continuous compressors, usual pressure is greater than the pressure in autoclave.

Although according to certain embodiment, other monomer can be used as starting material (it is a small amount of, be, for example, less than 5% or small In 2% or less than 1%) and although resulting polymers of the invention can therefore comprising it is a small amount of (be, for example, less than 5% or less than 2% Or less than the structural unit in addition to those of mentioned above 1%), but VDF, TrFE and X are only preferably used as starting material, So that polymer is only made of VDF and TrFE or VDF, TrFE and X.

However, using the monomer X of single type, therefore polymer of the invention is excellent according to a preferred embodiment It is selected as the terpolymer of the only X unit comprising VDF unit, TrFE unit and single type.

After synthesis, polymer is washed and dried.

The weight-average molar mass Mw of electroactive fluorinated copolymers (a) is preferably at least 100 000, preferably at least 200 000, And more preferably at least 300 000 or at least 400 000.It can be by changing certain technological parameters (such as temperature in reactor Degree) or adjusted by addition transfer agent.

Molar mass distribution can be by SEC (size exclusion chromatography) in the dimethylformamide (DMF) as eluant, eluent In estimate, use one group of 3 pillar with incremental porosity.Stationary phase is styrene-DVB gel.Detection method base In measurement refractive index, and calibrated with polystyrene standards.Sample is dissolved in DMF with 0.5g/l, and is passed through 0.45 μm of nylon filter filtering.

Molal weight can also be according to ASTM D1238 (ISO 1133) by surveying at 230 DEG C under the load of 5 or 10kg Melt flow index is measured to estimate.

In addition, molal weight can also be characterized according to ISO 1628 by solution viscosity measurement.Methyl ethyl ketone (MEK) is For measuring the copolymer of viscosity index (VI) and the preferred solvent of terpolymer.

More generally, a mole composition for terpolymer of the invention can determine by various modes.Carbon, fluorine, chlorine or bromine The conventional method of the elemental analysis of element obtains tool, and there are two independent unknown number (%VF2 and %TrFE, wherein %X=100- (%VF2+%TrFE)) two or three independent equations system, this makes the weight group that can clearly calculate polymer At can therefrom derive mole composition.

By solution of the analyzing polymers in deuterated solvent appropriate, it (is in this case matter that multicore, which also can be used, Son (¹H) and fluorine (¹⁹F)) NMR technology.NMR spectra records on the FT-NMR spectrometer equipped with multicore probe.Then according to one The signal specific provided by different monomers is positioned in the spectrum that kind or another seed nucleus generate.Therefore, TrFE (CFH=CF₂) single Member provides the signal specific feature of the H of CFH group in proton NMR (at about 5ppm).For VF₂CH₂The H of group It is such (peak not parsed, center is at 3ppm).The relative integral of two signals gives the relative abundance of two kinds of monomers, i.e., VDF/TrFE molar ratio.

Copolymer according to the present invention is random and linear.

Advantageously, electroactive fluorinated copolymers (component (a)) are the thermoplasticity polymerizations for having little or no elasticity Object (opposite with fluoroelastomer).Fluoropolymer containing a high proportion of unit derived from VDF comonomer has thermoplastic Property and stiff trend.

Copolymer used according to the invention further preferably meets at least one standard for describing it as electroactive polymer, Especially its Curie temperature is 0 to 150 DEG C, preferably 10 to 140 DEG C.

Its melt temperature is usually 90 to 180 DEG C, and more particularly 100 to 170 DEG C.

The dielectric constant of electroactive fluorinated copolymers used according to the invention under 25 DEG C and 1kHz is greater than 10, preferably greatly In 12.

It is difunctionality or more officials that second component (b) of cross-linkable composition according to the present invention, which is in terms of reactive double bond, (methyl) acrylic monomer of energy.Cross-linkable composition can contain one or more such monomers.

In terms of reactive double bond be difunctionality or polyfunctional described (methyl) acrylic monomer can for difunctionality or Polyfunctional (methyl) acrylic monomer or oligomer.The monomer used in the present invention, can be mentioned that containing at least two The monomer and oligomer of the reactive double bond of (methyl) acrylic-type.Exactly these reactive double bonds draw by free radical polymerization Hair agent will allow (methyl) acrylic acid network in [electroactive fluorinated copolymers-(methyl) acrylic acid cross-linked network] structure poly- It closes and is crosslinked.As a result, any pure (methyl) acrylic compounds difunctionality or polyfunctional monomer is used in the present invention, such as 12 Alkane dimethylacrylate.

However, in general, (methyl) acrylic monomer or oligomer have derived from the function in addition to pure alkane chemistry The chemical structure of group, such as glycol, triol or polyalcohol, polyester, ether, polyethers, polyurethanes, epoxides, cyanuric acid Ester (cyanurate) or isocyanuric acid ester (chlorinated isocyanurates).As long as in its chemical structure, (it is that mixed result (is not pure Property based on hydrocarbon: alkane type)) in, these monomers are contained at least two has reactive (first in free radical polymerization Base) acrylic functional group, just become for the present invention.Therefore it can be mentioned that such as 1,3 butylene glycol two (methyl) acrylic acid Ester, butanediol two (methyl) acrylate, 1,6-hexylene glycols two (methyl) acrylate, alkoxylate hexylene glycol two (methyl) third Olefin(e) acid ester, alkoxylate neopentyl glycol two (methyl) acrylate, dodecyl two (methyl) acrylate, cyclohexanedimethanol Two (methyl) acrylate, diethylene glycol two (methyl) acrylate, dipropylene glycol two (methyl) acrylate, linear paraffin two (methyl) acrylate, Ethoxylated bisphenol A bis- (methyl) acrylate, ethylene glycol two (methyl) acrylate, neopentyl glycol Two (methyl) acrylate, Tricyclodecane Dimethanol diacrylate, triethylene glycol two (methyl) acrylate, tetraethylene glycol two (methyl) acrylate, tripropylene glycol two (methyl) acrylate, two trimethylolpropane four (methyl) acrylate, ethyoxyl Change pentaerythrite four (methyl) acrylate, dipentaerythritol five (methyl) acrylate, five (methyl) acrylate, Ji Wusi Alcohol four (methyl) acrylate, ethoxylated trimethylolpropane three (methyl) acrylate, oxyalkylated trihydroxy methyl-propane Three (methyl) acrylate, trimethylolpropane tris (methyl) acrylate, pentaerythrite three (methyl) acrylate, propoxyl group Change trimethylolpropane tris (methyl) acrylate, trimethylol-propane trimethacrylate, dodecanediol two (methyl) Acrylate, dodecane two (methyl) acrylate, dipentaerythritol five/six (methyl) acrylate, four (first of pentaerythrite Base) acrylate, two trimethylolpropane four (methyl) acrylate, propoxylated glyceryl three (methyl) acrylate, third Oxygroup glyceryl three (methyl) acrylate, three (2- ethoxy) isocyanuric acid ester three (methyl) acrylate, polyester (first Base) acrylate, polyethers (methyl) acrylate, polyethylene glycol (methyl) acrylate, polypropylene glycol (methyl) acrylate, Polyurethanes (methyl) acrylate, epoxy group (methyl) acrylate with and combinations thereof.

Preferably, bifunctional or polyfunctional (methyl) acrylic monomer or oligomer can be selected from: trimethylolpropane Triacrylate (such as sold by Sartomer Company with reference number SR351), three propylene of ethoxylated trimethylolpropane Acid esters (such as sold by Sartomer Company with reference number SR454), polyacrylate modified aliphatic urethane (example As sold by Sartomer Company with reference number CN927).

Cross-linkable composition according to the present invention also contains at least one radical polymerization initiator (component (c)).Crosslinking Initiator is selected from 2- hydroxy-2-methyl -1- phenyl propyl- 1- ketone, 2,4,6- trimethylbenzoy-dipheny phosphine oxide, 2,4, 6- trimethylbenzoyl phenyl phosphinate, 1- hydroxycyclohexylphenylketone, bis- (2,6- Dimethoxybenzoyls) -2,4, 4- trimethylpentylphosphine oxide, 1- [4- (2- hydroxyl-oxethyl) phenyl] -2- hydroxy-2-methyl -1- propyl- 1- ketone, 2,2- diformazan Oxy-1,2- diphenyl second-1- ketone and 2- methyl-1-[4- (methyl mercapto) phenyl]-2- morpholino propyl- 1- ketone, 2,4- diethyl Thioxanthones, its derivative and its mixture.

As the solvent (d) for being used to prepare solution, electroactive fluorinated copolymers, (methyl) acrylic acid can be made using being selected from Class monomer (b) and polymerization initiator dissolve, and preferably dissolve in heterogeneity, to be preferably formed as the solvent of clear solution or mixing for solvent Close object.It particularly can be mentioned that: ketone, such as acetone, methyl ethyl ketone, methyl iso-butyl ketone (MIBK), cyclopentanone；Furans, such as tetrahydro furan It mutters；Ester, such as methyl acetate, ethyl acetate, propyl acetate, butyl acetate or methyl proxitol acetate (PGMEA)；Carbonic acid Ester, such as dimethyl carbonate；Amide, such as dimethylformamide and dimethyl acetamide；And sulfoxide solvent, such as dimethyl Sulfoxide.

5th and last component of cross-linkable composition according to the present invention are by the additive (component selected from following list (e)) it indicates: being other (methyl) acrylic monomers of simple function in terms of reactive double bond, for changing surface tension, stream Denaturation, resistance to ag(e)ing (such as the anti-UV additive of organic forms, such as dihydroxy benaophenonel or hydroxy phenyl benzotriazole, or The anti-UV additive of inorganic type, such as TiO₂), adhesiveness (such as molecule or oligomer or polymer with associative groups, The associative groups can be weak acid such as carboxylic acid ,-COOH or phosphonic acids ,-P (O) (OH)₂) or color (such as the face of organic forms Material, such as the pigment of phthalocyanine or anthraquinone or inorganic type, such as iron, copper, manganese or chromium complex) reagent, filler (such as TiO₂、CaCO₃, micron-scale clay and zeolite) and nanofiller (clay and zeolite of nano-scale, carbon nanotube).These Additive is intended to improve the property of composition or the film formed by the ink as ink.Preferred additive especially changes The surface tension of ink and/or the cosolvent of rheological characteristic.Particularly, in the case where solution, compound can by can with used The miscible inorganic compound of solvent.Printing ink composition also contains one or more additives being added, Lai Gaijin ink Property, such as the ability on its surface for soaking electronic device, or such as its adhesiveness to the surface.

Advantageously, solution according to the present invention, which does not contain, has nitrine functional group (N₃) compound.According to H.C.Kolb Deng article；Angew.Chem.Int.Ed., 2001,40,2004-2021, the compound with nitrine functional group usually has Explosive and toxicity.

According to an embodiment, in crosslinkable contradictory (opposition) according to the present invention:

I. 60 weight % of sum composed by the weight of electroactive fluorinated copolymers (a) constituent component (a) and (b) are extremely 99.99 weight %, and preferably 70 weight % to 99 weight %,

Ii. 0.1 weight % to 10 of sum composed by the weight of radical initiator (c) constituent component (a), (b) and (c) Weight %, and preferably 0.2 weight % to 5 weight %,

Iii. additive (e) constitutes the 0.01 weight % to less than 20 weight % of composition weight.

Cross-linkable composition according to the present invention includes the non-volatile solids object of 0.5 weight % to 60 weight %, and excellent Select 1 weight % to the non-volatile solids object of 30 weight %.

According to second aspect, the present invention relates to (methyl) acrylic copolymers comprising electroactive fluorinated copolymers and crosslinking The cross linking membrane of object.Be characterized in that, the fluorinated copolymers are not crosslinked, therefore be maintained at chemical aspect both not over can structure There is the comonomer of reactive repetitive unit in crosslinking in pairs and be modified, also polymerizeing not over chemical modification Generate on object has reactive site and is modified for crosslinking.In this approach, will be more (function) acrylic monomer Closely mixed with electroactive fluoropolymer (pass through carry out ink (solution) method obtain), then make the monomer polymerization simultaneously that This crosslinking.Unlike the prior art, in cross linking membrane according to the present invention, fluoropolymer ingredient be not chemically modified with Crosslink sites are generated with fluoropolymer sheet.

According to the third aspect, the present invention relates to a kind of methods for being used to prepare the cross linking membrane, and the method includes following Sequential step:

Cross-linkable composition according to the present invention is provided, as described above, wherein by the component (a), (b), (c) and (e) It is dissolved in the solvent (d) to obtain ink,

The ink is deposited on (light) electronic device, in a part of device or on supporter to form film,

The film is dried by partly or entirely evaporating solvent, and

It is crosslinked all or part of the film by the polymerization of (methyl) acrylic monomer,

In the case where desirably forming predetermined pattern, make the film development to remove uncrosslinked part.

According to an embodiment, radical initiator is a kind of photoinitiator, can be by partially or completely by falling The light of spectrum cross section composition in ultraviolet range (that is passes through all or part of spectrum in wavelength 150 to 410nm Light in range) process irradiation is deposited and " drying " ink layer (evaporation of some or all of solvent) carrys out activatable free radical and draws Hair.Preferably, the activation of initiator by the inclusion of the wavelength within the scope of UVA (in 315 to 410nm spectral region) spoke It penetrates to obtain.Preferably, initiator is obtained with the radiation for the wavelength being included at 365nm and/or 385nm and/or 405nm Activation.It is further preferred that for causing the irradiation dose of crosslinking to be less than 20J/cm², and more preferably less than 10J/cm².The dosage is low The dosage needed for two-fold nitride.This reduces the property that can avoid the multi-layered devices containing photosensitive layer.

Finally, the purposes the invention also includes electroactive copolymer layer (film) in (light) electronic device as dielectric layer, Such as the dielectric layer with high-dielectric constant (dielectric constant), the small thickness for allowing to manufacture field effect transistor or ferroelectric memory, Especially in the organic electronic product scope of printing.Electroactive fluorinated copolymerizable nitride layer with low or high-dielectric constant crosslinking may be used also For memory, capacitor, sensor, actuator, electromechanical micro-system, haptic device and capacitor (condenser, condenser) Preparation field.

Term " electronic device " is intended to mean Single Electron component or one group of electronic building brick, can hold in electronic circuit Row one or more functions.

Preferably, in the context of the present invention, electronic device is more particularly photoelectron device, that is to say, that Neng Goufa Penetrate, detect or control electromagnetic radiation.

The example of electronic device of the present invention or photoelectron device if applicable be transistor, chip, battery, Photovoltaic cell, light emitting diode (LED), Organic Light Emitting Diode (OLED), sensor, actuator, transformer and detector.

Electronics and photoelectron device are used for and are integrated into numerous electronics subassemblies, in the equipment or instrument device, Yi Jiyong In numerous objects and application, such as TV, mobile phone, rigidity or flexible screen, thin film photovoltaic module, light source, energy conversion Device and sensor etc..

In a device in accordance with the invention, the thickness of the layer of film is less than 100 μm, and preferably smaller than 80 μm.According to this In certain devices of invention, such as memory or transistor, the thickness of the layer of film are smaller than 1 μm.

It is (secondary flat with Ra that the surface roughness (being measured with contourgraph) of fluoropolymer layer is preferably lower than or equal to 20nm Mean indicates), and more specifically less than or equal to 10nm, and even more preferably less than or equal to 7nm.The surface roughness It can be measured by measuring surface topography with α-rank IQ type contourgraph.