阅读说明：本技术 用于生产聚合物的方法 (Process for producing polymers ) 是由 许允衡 李济权 尹圣琇 朴鲁振 崔银英 具世真 李美宿 柳亨周 姜那那 李应彰 于 2018-07-16 设计创作，主要内容包括：本申请涉及用于生产聚合物的方法。本申请可以在最小化或消除副反应等的同时以优异的效率生产在其末端含有金属原子或卤素原子的聚合物,并且还可以自由地控制聚合物的分子量特性。(The present application relates to a process for producing a polymer. The present application can produce a polymer containing a metal atom or a halogen atom at the terminal thereof with excellent efficiency while minimizing or eliminating side reactions and the like, and can also freely control the molecular weight characteristics of the polymer.)

1. A method for producing a polymer, comprising the step of anionically polymerizing a monomer in the presence of an aromatic organometallic compound to produce a polymer having a metal attached to a terminal thereof.

2. The method for producing a polymer according to claim 1, wherein the aromatic organometallic compound is represented by the following formula 1:

[ formula 1]

Wherein R is₁Is alkyl, and R₂Is a metal.

3. The method for producing a polymer according to claim 1, wherein the monomer is an acrylic monomer.

4. The method for producing a polymer according to claim 1, wherein the monomer is represented by the following formula 2:

[ formula 2]

Wherein R is hydrogen or alkyl, X is oxygen atom, sulfur atom, -S (═ O)₂-, carbonyl, -C (═ O) -X₁-or-X₁-C (═ O) -, where X₁Is an oxygen atom, a sulfur atom, -S (═ O)₂-alkylene, alkenylene or alkynylene, and Y is alkyl or alkylaryl or alkoxyaryl.

5. The method for producing a polymer according to claim 1, wherein the anionic polymerization is carried out at a temperature in the range of-85 ℃ to-10 ℃.

6. The method for producing a polymer according to claim 1, further performing a step of reacting a mixture containing an aromatic compound having a double bond and a metal-containing compound to produce the aromatic organometallic compound.

7. The method for producing a polymer according to claim 6, wherein the metal-containing compound comprises an organometallic compound and a metal halide.

8. The method for producing a polymer according to claim 7, wherein the organometallic compound is a hydrocarbon compound having 1 to 16 carbon atoms containing lithium, sodium or potassium, rubidium or cesium.

9. The method for producing a polymer according to claim 6, wherein the aromatic compound having a double bond is represented by the following formula 3:

[ formula 3]

Wherein Q is a hydrogen atom, an alkyl group or an aryl group.

10. The method for producing a polymer according to claim 6, wherein the mixture contains an aromatic compound containing a double bond in an amount in the range of 1 mol% to 60 mol% relative to the metal-containing compound.

11. The method for producing a polymer according to claim 6, wherein the reaction of the mixture is performed at a temperature in the range of-85 ℃ to-10 ℃.

12. The method for producing a polymer according to claim 1, wherein a polymer having a molecular weight distribution of 1.4 or less is produced.

13. The method for producing a polymer according to claim 1, wherein a polymer having a number average molecular weight of 10,000 or more is produced.

14. A method of producing a polymer comprising the steps of: reacting a mixture of the polymer in which a metal is bonded to a terminal and the compound containing a halogen atom obtained by the production method according to claim 1 to form a polymer in which the halogen atom is introduced at a terminal thereof.

15. The method for producing a polymer according to claim 14, wherein the compound containing a halogen atom is represented by any one of formulae 4 to 6:

[ formula 4]

[ formula 5]

[ formula 6]

Wherein the content of the first and second substances,in formula 4, R₁To R₆Each independently is hydrogen, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkylene, alkenylene, or alkynylene, wherein R is₁To R₆The number of halogen atoms contained in (a) is 1 or more; in formula 5, n is a number in the range of 1 to 100, and Y is a halogen atom; and in formula 6, n is a number in the range of 1 to 100, and Hal is a halogen atom.

16. The method for producing a polymer according to claim 14, wherein the halogen atom is bromine (Br), iodine (I), or chlorine (Cl).

17. The method for producing a polymer according to claim 14, wherein the mixture contains the halogen atom-containing compound at a ratio of 1 to 20 mol% relative to the number of moles of the monomer of the polymer in which a metal is bonded to a terminal.

Technical Field

The present application claims priority based on korean patent application No. 10-2017-.

The present application relates to a process for producing a polymer.

Background

Polymers having a halogen element such as Br or Cl as their terminal group have been studied in many ways due to the possibility of various applications such as a polymerization initiator. As a method of synthesizing a polymer having a halogen element as its terminal group, a method of synthesizing a polymer using an initiator having a halogen element or synthesizing a polymer by combining a single molecule having a halogen element with a polymer having a hydroxyl group as its terminal is known. However, the method using an initiator containing a halogen element has a problem that only a limited number of polymers can be synthesized due to the initiator containing a limited halogen element. Further, in the method of using a polymer having a hydroxyl group as its terminal group, the polymer having a hydroxyl group as a terminal group is limited, and when a single molecule having a halogen element is bonded, its efficiency is lowered, so that there are inconveniences and difficulties in purification. In particular, when a (meth) acrylate derivative is used, there is a problem in that a side reaction occurs such that polymerization is stopped by attacking carbonyl groups of a polymer chain having a growth terminal or attacking carbonyl groups of a monomer having an initiator or a growth terminal.

Disclosure of Invention

Technical problem

The present application relates to a process for producing a polymer. An object of the present application is to provide a method for producing a polymer, which can produce a polymer containing a halogen atom at the terminal thereof with excellent efficiency while minimizing or eliminating side reactions and the like, and also can freely control the molecular weight characteristics of the polymer.

Technical scheme

In the present specification, unless otherwise specified, the term monovalent or divalent hydrocarbon group may mean a monovalent or divalent residue derived from a compound consisting of carbon and hydrogen or a derivative thereof. Here, as the compound composed of carbon and hydrogen, alkane, alkene, alkyne, or aromatic hydrocarbon can be exemplified.

The term alkyl herein may mean an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified. The alkyl group may be a linear, branched or cyclic alkyl group, and may be optionally substituted with one or more substituents.

The term alkoxy herein may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, or 1 to 12 carbon atoms, unless otherwise specified. The alkoxy group may be a linear, branched or cyclic alkoxy group, and may be optionally substituted with one or more substituents.

The term alkenyl or alkynyl herein can mean alkenyl or alkynyl having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. The alkenyl or alkynyl group may be linear, branched or cyclic, and may be optionally substituted with one or more substituents.

The term alkylene herein can mean an alkylene having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, unless otherwise specified. The alkylene group may be a linear, branched or cyclic alkylene group, and may be optionally substituted with one or more substituents.

The term alkenylene or alkynylene herein may mean an alkenylene or alkynylene group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, unless otherwise specified. Alkenylene or alkynylene groups may be linear, branched, or cyclic, and may be optionally substituted with one or more substituents.

Unless otherwise specified, the term aryl or arylene herein may mean a monovalent or divalent residue derived from a compound or derivative thereof comprising a benzene ring structure or a structure in which two or more benzene rings are connected while sharing one or two carbon atoms or are connected by any connecting group.

Unless otherwise specified, the aryl or arylene group can be, for example, an aryl group having 6 to 30 carbon atoms, 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 13 carbon atoms.

In the present application, the term aromatic structure may mean an aryl or arylene group.

In the present specification, unless otherwise specified, the term alicyclic ring structure means a cyclic hydrocarbon structure other than an aromatic ring structure. Unless otherwise specified, the alicyclic ring structure may be, for example, an alicyclic ring structure having 3 to 30 carbon atoms, 3 to 25 carbon atoms, 3 to 21 carbon atoms, 3 to 18 carbon atoms, or 3 to 13 carbon atoms.

In the present application, the term single bond may mean the absence of a separate atom at the relevant site. For example, in the structure represented by a-B-C, when B is a single bond, this means that there is no atom at the site represented by B, and a and C are directly connected to form the structure represented by a-C.

In the present application, the substituent which may be optionally substituted in the alkyl group, alkenyl group, alkynyl group, alkylene group, alkenylene group, alkynylene group, alkoxy group, aryl group, arylene group, linear chain or aromatic structure, etc. may be exemplified by a hydroxyl group, a halogen atom, a carboxyl group, a glycidyl group, an acryloyl group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group, a thiol group, an alkyl group, alkenyl group, alkynyl group, alkylene group, alkenylene group, alkynylene group, alkoxy group or aryl group, etc., but is not limited thereto.

The present application relates to a process for producing a polymer. The production process of the present application may comprise a step of anionically polymerizing monomers in the presence of an aromatic organometallic compound. The method may include the step of producing a polymer with a metal attached to the terminal through the above steps. In one example, the metal attached to one end of the polymer may be a metal contained in an aromatic organometallic compound. In one example, other moieties of the aromatic organometallic compound besides the metal can be attached to the other end of the polymer.

The term aromatic organometallic compound means a compound comprising an aromatic structure and a metal.

In one example, aromatic organometallic compounds can be used as initiators for anionic polymerization. By using such an aromatic organometallic compound and adjusting the ratio of the monomer to the aromatic organometallic compound, the polymerization process can be efficiently performed, and a polymer having an appropriate molecular weight and molecular weight distribution can be produced according to the purpose.

Here, the method for carrying out the anionic polymerization is not particularly limited. For example, the anionic polymerization may be living anionic polymerization in which a living end is obtained by a growth reaction of an anion. When the aromatic organometallic compound and the monomer are polymerized by an anionic polymerization method, the organometallic compound can be used as an anionic polymerization initiator and polymerized with the monomer. By polymerizing the organometallic compound and the monomer by living anion polymerization, the metal can be adjusted to be located at the terminal of the monomer bonded to the organometallic compound, and a target polymer whose molecular weight and molecular weight distribution are controlled can be efficiently synthesized.

In one example, the organometallic compound may be a compound represented by the following formula 1.

[ formula 1]

In formula 1, R₁Is alkyl, and R₂Is a metal.

The metal may be lithium, sodium or potassium.

In one example, R in formula 1 above₁May be an alkyl group having 1 or more, 2 or more, 3 or more, 4 or more, or 5 or more carbon atoms, and the number of carbon atoms in the alkyl group may be 20 or less, 18 or less, 16 or less, 14 or less, 12 or less, 10 or less, 8 or less, or 6 or less. The alkyl group can be linear, branched, or cyclic, and in one example, the alkyl group can be branched.

In the production method of the present application, the monomer used in the step of producing the polymer may be, for example, an acrylic monomer. In the present application, the term acrylic monomer may mean acrylic acid, methacrylic acid, acrylate ester or methacrylate ester.

In one example, the monomer to be applied to the production process may be a compound represented by the following formula 2.

[ formula 2]

In formula 2, R is hydrogen or alkyl, X is oxygen atom, sulfur atom, -S (═ O)₂-, carbonyl, -C (═ O) -X₁-or-X₁-C (═ O) -, where X₁Is an oxygen atom, a sulfur atom, -S (═ O)₂-alkylene, alkenylene or alkynylene, and Y is alkyl or alkylaryl or alkoxyaryl.

In formula 2, R may be hydrogen, an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 1 to 2 carbon atoms, but is not limited thereto.

In formula 2, X is-S (═ O)₂-、-C(＝O)-X₁-or-X₁-C (═ O) -, where X₁May be an oxygen atom or a sulfur atom.

In addition, Y may be an alkyl group, an alkylaryl group, or an alkoxyaryl group, wherein the alkyl group may be an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms, or a linear, branched, or cyclic alkyl group having 4 to 20 carbon atoms, 8 to 16 carbon atoms, 8 to 12 carbon atoms, or 12 to 16 carbon atoms.

The compound of formula 2 may be exemplified by, for example, alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, hexadecyl (meth) acrylate or stearyl (meth) acrylate, or p-alkylphenyl (meth) acrylate or p-alkoxyphenyl (meth) acrylate such as p-dodecylphenyl (meth) acrylate or p-dodecyloxyphenyl (meth) acrylate, etc., but is not limited thereto. In the present specification, (meth) acrylate may mean acrylate or methacrylate.

The content of the monomer applied to the production process is not particularly limited. When the input of the monomer is increased at the time of living anionic polymerization, the number of repeating units of the monomer bonded to the organometallic compound may be increased, thereby producing a polymer having a desired repeating unit. The monomer may be contained in a ratio of, for example, 1 mol% to 10,000 mol% with respect to a metal-containing compound to be described below.

In one example herein, the aromatic organometallic compound can be a reaction compound comprising a mixture of an aromatic compound containing a double bond and a metal-containing compound. That is, the aromatic organometallic compound can be formed by reacting a mixture containing an aromatic compound having a double bond and a metal-containing compound. By this reaction, the metal may substitute for the organometallic compound to produce the above aromatic organometallic compound. By using such a compound as an initiator, polymers having various terminal groups can be efficiently produced.

In one example of the present application, the metal-containing compound can be an organometallic compound, a metal halide, or a mixture thereof.

Here, the organometallic compound may be, for example, a hydrocarbon compound containing lithium, sodium, or potassium. The hydrocarbon compound may be a hydrocarbon compound having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms. In one example, the compound can be an alkane, alkene, or alkyne having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms substituted with at least one metal. When the compound is an alkene or alkyne, the lower limit of the number of carbon atoms is 2. As the metal-containing compound, there can be used alkyllithium compounds such as methyllithium, ethyllithium, propyllithium, butyllithium (n-butyllithium, sec-butyllithium, isobutyllithium, tert-butyllithium, etc.), pentyllithium and hexyllithium, but not limited thereto.

Here, the metal halide may also be a lithium halide, and the halogen atom contained therein may be bromine (Br), iodine (I), or chlorine (Cl), but is not limited thereto.

The aromatic compound having a double bond may be a compound represented by the following formula 3.

[ formula 3]

In formula 3, Q is a hydrogen atom, an alkyl group or an aryl group.

Q may be an alkyl group having 1 to 8 carbon atoms, 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In addition, Q may be an aryl group having 6 to 18 carbon atoms or 6 to 12 carbon atoms, but is not limited thereto.

When Q is an aryl group, the double bond-containing aromatic compound of the present application may comprise two or more aromatic ring structures.

The compound of formula 3 may be, for example, 1-diphenylethylene, 1-bis (p-methylphenyl) ethylene, 1-bis (m-methylphenyl) ethylene, 1-bis (p-chlorophenyl) ethylene, 1-bis (m-chlorophenyl) ethylene, stilbene (trans-1, 2-diphenylethylene), isostearyl (cis-1, 2-diphenylethylene), trans-1, 2-bis (p-methylphenyl) ethylene, 1, 2-bis (m-methylphenyl) ethylene, 1, 2-bis (p-chlorophenyl) ethylene, 1, 2-bis (m-chlorophenyl) ethylene, cis-1, 2-bis (p-methylphenyl) ethylene, cis-1, 2-bis (m-methylphenyl) ethylene or cis-1, 2-bis (p-chlorophenyl) ethylene, but is not limited thereto.

In one example of the present application, in the mixture including the aromatic compound including a double bond and the metal-containing compound, the aromatic compound may be included at a ratio of 1 mol% to 60 mol% with respect to the metal-containing compound. In another example, the content may be 1 mol% or more, 2 mol% or more, 3 mol% or more, 4 mol% or more, or 5 mol% or more, and may be 30 mol% or less, 28 mol% or less, 26 mol% or less, 24 mol% or less, 22 mol% or less, or 20 mol% or less. Within the above range, the side reaction of the polymerization reaction can be effectively suppressed.

In one example, when the metal-containing compound is a mixture of an organometallic compound and a metal halide, the ratio of the number of moles of metal halide (M2) to the number of moles of organometallic compound (M1) in the mixture (M2/M1) can be in the range of 0.5 to 30. In another example, the ratio (M2/M1) may be about 0.7 or greater, 0.9 or greater, 1 or greater, 1.1 or greater, 1.3 or greater, or 1.5 or greater, or may also be about 29 or less, about 26 or less, about 24 or less, about 22 or less, about 20 or less, or about 19 or less.

In one example, in the production method according to the present application, the reaction may be carried out at a temperature in the range of-85 ℃ to-10 ℃. The reaction temperature may be a reaction temperature in the anionic polymerization step, and may be a reaction temperature in a reaction for producing an aromatic organometallic compound. In another example, the temperature can be about-85 ℃ or more, -83 ℃ or more, -81 ℃ or more, -80 ℃ or more, -78 ℃ or more, -76 ℃ or more, -74 ℃ or more, -72 ℃ or more, -70 ℃ or more, -68 ℃ or more, -66 ℃ or more, -64 ℃ or more, -62 ℃ or more, -60 ℃ or more, -58 ℃ or more, -56 ℃ or more, -54 ℃ or more, -52 ℃ or more, or-50 ℃ or more, -48 ℃ or more, or-46 ℃ or more, and can be-10 ℃ or less, -20 ℃ or less, -30 ℃ or less, -33 ℃ or less, -36 ℃ or less, -39 ℃ or less, or less, Or-42 ℃ or less. By conducting the anionic polymerization reaction and/or the reaction of the aromatic organometallic compound in the above temperature range, a polymer whose molecular weight distribution is controlled can be formed while suppressing side reactions, so that a high molecular weight material of a desired range can be produced.

In one example, the production method of the present application may further include the steps of: the polymer having a metal attached to its terminal is reacted with a compound containing a halogen atom to form a polymer having a halogen atom introduced at its terminal. That is, the production method of the present application may be a production method of a polymer, the method including the steps of: a mixture comprising the polymer (polymer) having a metal atom at the terminal thereof obtained by the above-mentioned step and a compound having a halogen atom is reacted. By the above reaction, a polymer having a halogen atom introduced at the terminal thereof can be formed.

The compound containing a halogen atom may be a compound represented by the following formula 4, 5 or 6.

[ formula 4]

[ formula 5]

[ formula 6]

In formula 4, R₁To R₆May each independently be a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, a haloalkyl group, a haloalkenyl group, a haloalkynyl group, an alkylene group, an alkenylene group, an alkynylene group or the like, wherein R is₁To R₆The number of halogen atoms contained in (a) may be at least 1 or more, 2 or more, or 3 or more. In another example, R₁To R₆The number of halogen atoms included in (a) may be 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, or 3 or less.

Here, the haloalkyl group, the haloalkenyl group or the haloalkynyl group denotes an alkyl group, an alkenyl group or an alkynyl group substituted with at least one or more halogen atoms.

In one example, R in the above formula₁To R₆At least one or more, two or more, or three or more of them may be haloalkyl, haloalkenyl, or haloalkynyl. The number of haloalkenyl, haloalkyl or haloalkynyl groups can be 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, or 3 or less.

On the other hand, in formula 5, n may be a number in the range of 1 to 100, and Y is a halogen atom.

Further, in formula 6, n is a number in the range of 1 to 100, and Hal is a halogen atom.

In formulas 5 and 6 above, n may each independently be a number in the range of 1 to 90, 1 to 80, 1 to 70, 1 to 60, 1 to 50, 1 to 40, 1 to 30, 1 to 20, 1 to 10,1 to 8, 1 to 6, 1 to 4, or 1 to 2, and the halogen atom may be bromine (Br), iodine (I), or chlorine (Cl), but is not limited thereto.

In formula 4, the alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkylene, alkenylene, or alkynylene group may be, for example, an alkyl, alkenyl, alkynyl, haloalkyl, haloalkenyl, haloalkynyl, alkylene, alkenylene, or alkynylene group having 1 to 8 carbon atoms, 1 to 6 carbon atoms, or 1 to 4 carbon atoms, but is not limited thereto. The alkyl, alkylene, alkenylene, or alkynylene group may be substituted with a halogen atom or may not be substituted with a halogen atom, but at least two or more of the alkyl, alkylene, alkenylene, and alkynylene group may be substituted with a halogen atom.

The halogen atom substituted in formula 4 or the halogen atom contained in formula 5 may be bromine (Br), iodine (I), or chlorine (Cl), but is not limited thereto.

In one example of the present application, in the reaction mixture including the metal-terminally introduced polymer (polymer) and the halogen atom-containing compound, the halogen atom-containing compound may be included at a ratio of about 1 mol% to 20 mol% with respect to the number of moles of monomers forming the metal-terminally introduced polymer (polymer). The compound containing a halogen atom can be 1.5 mol% or more or 2 mol% or more of the metal-containing compound, and in another example, it can also be about 18 mol% or less, about 16 mol% or less, about 14 mol% or less, about 12 mol% or less, about 10 mol% or less, about 8 mol% or less, about 6 mol% or less, about 5 mol% or less, or about 4 mol% or less.

The reaction, i.e., the reaction of the mixture comprising the polymer (polymer) having a metal atom at the terminal and the compound having a halogen atom, may also be carried out at a temperature in the range of-85 ℃ to-10 ℃. In one example, after the process of producing a polymer (polymer) containing a metal atom at the terminal, a halogen atom-containing compound may be continuously introduced to perform a subsequent reaction. In another example, the temperature can be about-85 ℃ or more, -83 ℃ or more, -81 ℃ or more, -80 ℃ or more, -78 ℃ or more, -76 ℃ or more, -74 ℃ or more, -72 ℃ or more, -70 ℃ or more, -68 ℃ or more, -66 ℃ or more, -64 ℃ or more, -62 ℃ or more, -60 ℃ or more, -58 ℃ or more, -56 ℃ or more, -54 ℃ or more, -52 ℃ or more, -50 ℃ or more, -48 ℃ or more, or-46 ℃ or more, and can be-10 ℃ or less, -20 ℃ or less, -30 ℃ or less, -33 ℃ or less, -36 ℃ or less, -39 ℃ or less, or less, Or-42 ℃ or less. By conducting the reaction in the above temperature range, a polymer whose molecular weight distribution is controlled can be formed while suppressing side reactions, so that a high molecular weight material of a desired range can be produced.

In addition to the organometallic compound and the halogen atom-containing compound as described above, the process for producing a polymer of the present application may further contain a solvent, a side reaction inhibitor, and the like, if necessary.

As the solvent applicable to the production method of the present application, ether solvents such as diethyl ether, tetrahydrofuran, and dioxane can be used

Alkane

Alkane, dimethoxyethane and toluene; aromatic hydrocarbon solvents such as ethylbenzene; tertiary amine-based solvents such as Tetramethylethylenediamine (TMEDA) and hexamethylphosphoric triamide (HMPA), and mixed solvents composed of two or more thereof, but not limited thereto.

Further, as a side reaction inhibitor applicable to the production method of the present application, a lithium-containing substance such as LiCl, LiOH, LiBr, LiOBu and LiN (Et)₂；Et₂Zn (diethyl zinc); trioctylaluminum ([ CH)₃(CH₂)₇]Al), but is not limited thereto.

The polymer according to the production method of the present application may have a molecular weight distribution of 1.4 or less. In the present specification, the term number average molecular weight, weight average molecular weight, or molecular weight distribution (PDI) may mean a conversion value to standard polystyrene measured by GPC (gel permeation chromatography), as described in examples to be described below, and the term molecular weight means a number average molecular weight unless otherwise specified. The molecular weight distribution (PDI: Mw/Mn), i.e., the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn), of the polymer may be 1.4 or less, 1.37 or less, 1.34 or less, 1.31 or less, 1.28 or less, 1.25 or less, or 1.22 or less, and the lower limit is not particularly limited, but the lower limit may be, for example, 1.01 or more, or 1.04 or more. The polymer having the molecular weight distribution may be a polymer having a metal atom introduced at a terminal or a polymer having a halogen atom introduced at a terminal.

The number average molecular weight (Mn) of the polymer according to the production method of the present application may be 10,000 or more. The number average molecular weight may be, for example, 10,100 or greater, 10,300 or greater, 10,600 or greater, 10,900 or greater, 11,200 or greater, or 11,500 or greater. In another example, the number average molecular weight can be about 100,000 or less, 90,000 or less, 80,000 or less, 70,000 or less, 60,000 or less, 50,000 or less, or 40,000 or less.

The polymers of the present application formed in this manner may be applied to a variety of applications, including macroinitiators for further reactions and the like.

Advantageous effects

The present application can produce a polymer containing a metal atom or a halogen atom at the terminal thereof with excellent efficiency while minimizing or eliminating side reactions and the like, and can also freely control the molecular weight characteristics of the polymer.

Drawings

Fig. 1 to 9 show the results of NMR analysis of the substances produced in the examples.

Detailed Description

Hereinafter, the present application will be described in more detail by examples and comparative examples according to the present application, but the scope of the present application is not limited by the following examples.

NMR measurement

NMR analysis was performed at room temperature using an NMR spectrometer comprising a Varian Unity Inova (500MHz) spectrometer with a triple resonant 5mm probe. The analytes are dissolved in a solvent (CDCl) for NMR measurement₃) Diluted to a concentration of about 10mg/ml and used, and chemical shifts are expressed in ppm.

GPC (gel permeation chromatography)

The number average molecular weight (Mn) and molecular weight distribution were measured using GPC (gel permeation chromatography). The analyzed polymer was introduced into a 5mL vial and diluted in THF (tetrahydrofuran) to a concentration of about 1 mg/mL. Subsequently, the calibration standard sample and the analysis sample were filtered through a syringe filter (pore size: 0.45 μm) and measured. As an analysis procedure, ChemStation from Agilent Technologies was used, and the elution time of the sample was compared with a calibration curve to obtain a weight average molecular weight (Mw) and a number average molecular weight (Mn), respectively, and a molecular weight distribution (PDI) was calculated from the ratio (Mw/Mn).

The measurement conditions of GPC are as follows.

< GPC measurement conditions >

The device comprises the following steps: 1200 series from Agilent Technologies

Column: two PLGel mixed B from Polymer laboratories were used

Solvent: THF (tetrahydrofuran)

Column temperature: 35 deg.C

Sample concentration: injection of 1mg/mL and 200L

Standard samples: polystyrene (Mp: 3900000, 723000, 316500, 52200, 31400, 7200, 3940, 485)