阅读说明：本技术 一种pvc塑料及其制备方法 (PVC plastic and preparation method thereof ) 是由 张燕丹 葛铁军 肖尚雄 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种PVC塑料,由以下原料组成：PVC、抗静电剂、N,N’-乙撑双硬脂酰胺、甲基异丁基甲醇、乙氧基化三羟甲基丙烷三丙烯酸酯。本发明的PVC塑料具有良好的机械性能与防静电性能,制备方法简单,易于工业化生产。(The invention discloses PVC plastic which is prepared from the following raw materials: PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate. The PVC plastic disclosed by the invention has good mechanical properties and antistatic properties, and the preparation method is simple and is easy for industrial production.)

1. The PVC plastic is characterized by comprising the following raw materials: PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate.

2. The PVC plastic of claim 1, which is prepared from the following raw materials in parts by weight: 90-120 parts of PVC, 20-40 parts of antistatic agent, 1-5 parts of N, N' -ethylene bis stearamide, 2-5 parts of methyl isobutyl carbinol and 0.5-2 parts of ethoxylated trimethylolpropane triacrylate.

3. The PVC plastic of claim 1 or 2, wherein the antistatic agent is octadecyl trimethyl ammonium chloride or functionalized octadecyl trimethyl ammonium chloride.

4. The PVC plastic of claim 3, wherein the functionalized octadecyl trimethyl ammonium chloride is prepared by the following method: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol according to the mass ratio of 1 (5-15), and stirring at the temperature of 15-50 ℃ and 1500rpm for 1-5h to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass being 20-40% of the mass of the mixed solution, stirring for 15-30h at 15-50 ℃ and 1500rpm, vacuum drying for 48-72h at 65-95 ℃, and drying for 1-3h at 110-150 ℃ to obtain the functionalized octadecyl trimethyl ammonium chloride.

5. The PVC plastic of claim 4, wherein the modified tetraisopropyl di (dioctylphosphite acyloxy) titanate is prepared by the following method: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol according to the mass ratio of 1 (3-10), stirring at the temperature of 20-40 ℃ for 1-5h at 1500rpm for 1000-.

6. A process for the preparation of PVC plastics according to claims 1 to 5, comprising the following steps:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 20-50min according to a formula, wherein the blending temperature is 100-120 ℃, and the blending rotating speed is 300-600rpm to obtain a mixture;

(2) and (3) feeding the mixture into an extruder for extrusion, and performing injection molding at the extrusion temperature of 120-180 ℃ to obtain the PVC plastic.

Technical Field

The invention relates to the technical field of plastics, in particular to a PVC plastic and a preparation method thereof.

Background

The PVC plastic has the advantages of high mechanical strength, good electrical insulation, rich sources, low price and the like; as one of general-purpose thermoplastic plastics, they are widely used in the fields of agriculture, industry, construction, electric power, automobiles, and the like. It is prepared by polymerizing vinyl chloride under the action of initiator. Despite the many advantageous properties of PVC, there are some significant disadvantages, such as poor thermal stability, the generation of hydrogen chloride gas by decomposition at high temperatures; the impact resistance is poor, and the notch is sensitive. In addition, the applications are limited for some fields where special operational requirements (antistatic, flame retardant, electromagnetic shielding) are required. The invention aims to prepare the PVC plastic which can meet the antistatic application environment by utilizing the excellent characteristics of PVC.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a PVC plastic and a preparation method thereof.

In order to solve the technical problems, the invention adopts the technical scheme that:

the PVC plastic consists of the following raw materials: PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate.

Preferably, the PVC plastic is prepared from the following raw materials in parts by weight: 90-120 parts of PVC, 20-40 parts of antistatic agent, 1-5 parts of N, N' -ethylene bis stearamide, 2-5 parts of methyl isobutyl carbinol and 0.5-2 parts of ethoxylated trimethylolpropane triacrylate. Wherein N, N' -ethylene bis stearamide is used as a lubricant, methyl isobutyl carbinol is used as a dispersant, and ethoxylated trimethylolpropane triacrylate is used as a crosslinking agent.

The antistatic agent is octadecyl trimethyl ammonium chloride or functionalized octadecyl trimethyl ammonium chloride. Preferably, the antistatic agent is functionalized octadecyl trimethyl ammonium chloride.

The functionalized octadecyl trimethyl ammonium chloride is prepared by the following method: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol according to the mass ratio of 1 (5-15), and stirring at the temperature of 15-50 ℃ and 1500rpm for 1-5h to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass being 20-40% of the mass of the mixed solution, stirring for 15-30h at 15-50 ℃ and 1500rpm, vacuum drying for 48-72h at 65-95 ℃, and drying for 1-3h at 110-150 ℃ to obtain the functionalized octadecyl trimethyl ammonium chloride.

The modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate is prepared by the following method: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol according to the mass ratio of 1 (3-10), stirring at the temperature of 20-40 ℃ for 1-5h at 1500rpm for 1000-.

Preferably, the antistatic function reinforcing agent is nano silver powder and/or nano titanium dioxide powder. By adopting the functionalized octadecyl trimethyl ammonium chloride prepared by the invention as an antistatic agent, the antistatic performance of the plastic is enhanced; the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate functionalizes octadecyl trimethyl ammonium chloride, and because octadecyl trimethyl ammonium chloride has an antistatic effect, ammonium ions in ammonium salt have polarity, on one hand, titanium of tetraisopropyl di (dioctyl acyloxy phosphite) titanate in the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate belongs to metal elements, and the titanium has certain polarity, so that electrons can be released and absorbed, migration and diffusion of the electrons can be promoted, and the volume resistivity of the plastic is reduced; in addition, acyloxy in tetraisopropyl di (dioctyl phosphite acyloxy) titanate belongs to an electron donating group, wherein oxygen atoms have lone pair electrons, and the lone pair electrons are easy to exchange with electrons in the environment, so that the diffusion migration of electrons is promoted, and the volume resistivity is further reduced; the modified ammonium radical of octadecyl trimethyl ammonium chloride and acyloxy (polarity) of tetraisopropyl di (dioctyl phosphite acyloxy) titanate synergistically form a bonding similar to an ionic bond, so that the functions of the two substances exceed simple superposition;

on the other hand, metal atoms of nano silver and nano titanium dioxide in the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate can be used as good carriers of electrons, the reducibility of the metal enables the metal to volatilize electrons, the metal can absorb free electrons in the environment and oxidize the free electrons into atoms after becoming cations, the diffusion and movement of the electrons are promoted once the free electrons lose the original electrons, and the catalytic action can be played to enable the redox action in the short range to be continuously carried out, so that the contribution to the electron migration and diffusion is made; in addition, acyloxy in tetraisopropyl di (dioctyl phosphite acyloxy) titanate has a certain polar effect, and can be combined with nano silver and nano titanium dioxide in an ionic bond form, rather than simply added.

Further preferably, the antistatic function reinforcing agent is a mixture of nano silver powder and nano titanium dioxide powder according to a mass ratio of 1 (1-5).

Modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate prepared by compounding nano silver and nano titanium dioxide is adopted, so that the antistatic property of the plastic is further improved; this is because the resistance of the plastic is generated by scattering waves generated by each atom in the plastic for electrons, and the difference between the atomic radii of the two substances just causes the phase difference between the scattered waves of the two substances for electrons, so that the two scattered waves just cancel each other out, and the volume resistivity of the plastic is reduced.

The preparation method of the PVC plastic comprises the following steps:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 20-50min according to a formula, wherein the blending temperature is 100-120 ℃, and the blending rotating speed is 300-600rpm to obtain a mixture;

(2) and (3) feeding the mixture into an extruder for extrusion, and performing injection molding at the extrusion temperature of 120-180 ℃ to obtain the PVC plastic.

The invention has the beneficial effects that: the PVC plastic disclosed by the invention has good mechanical properties and antistatic properties, and the preparation method is simple and is easy for industrial production.

Detailed Description

The above summary of the present invention is described in further detail below with reference to specific embodiments, but it should not be understood that the scope of the above subject matter of the present invention is limited to the following examples.

Introduction of some raw materials in this application:

PVC, polyvinyl chloride, trade mark:1007, purchased from kelvin chemical ltd.

N, N' -ethylene bis stearamide, CAS: 110-30-5, the purity is 99 percent, and the product is purchased from capital and large chemical industry Co.

Ethoxylated trimethylolpropane triacrylate, CAS: 28961-43-5, molecular weight 912, purity 97%, available from Shandong Xiya chemical technology Co.

Methyl isobutyl carbinol, CAS: 108-11-2, 99% pure, available from Shanghai Yien chemical technology, Inc.

Octadecyl trimethyl ammonium chloride, CAS: 112-03-8 and 99 percent of purity, and is purchased from chemical industry Co., Ltd.

Absolute ethanol, CAS: 64-17-5, available from sahn chemical technology (shanghai) ltd, product number: A01A 040857.

Tetraisopropyl bis (dioctylphosphite acyloxy) titanate, CAS: 65460-52-8, available from Jusheng technology, Inc. of Hubei.

Nano silver powder, CAS: 85-60-9, available from sahn chemical technology (shanghai) ltd, product number: w010789-10ml, particle size 30 nm.

Nano titanium dioxide powder, CAS: 1317-70-0, available from sahn chemical technology (shanghai) ltd, product number: a62322-500g, particle size 20 nm.

Nano iron powder, CAS: 7439-89-6, available from Shanghai Allantin Biotechnology, Inc., product number: i116363-100g, particle size 30 nm.

Example 1

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and 1200rpm for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The preparation method of the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate comprises the following steps: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol in a mass ratio of 1:5 in a flask, stirring at the temperature of 25 ℃ for 3 hours at 1200rpm, adding an antistatic function reinforcing agent, wherein the mass ratio of the antistatic function reinforcing agent to the tetraisopropyl di (dioctyl phosphite acyloxy) titanate is 1:4, continuously stirring at the temperature of 25 ℃ for 5 hours at 1200rpm, carrying out centrifugal treatment at the rotating speed of 16000rpm, filtering, and drying filter residues for 5 hours at the temperature of 120 ℃ to obtain the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the antistatic function reinforcing agent is nano titanium dioxide powder.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Comparative example 1

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is octadecyl trimethyl ammonium chloride.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Comparative example 2

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and the rpm of 1200 for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Example 2

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and 1200rpm for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The preparation method of the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate comprises the following steps: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol in a mass ratio of 1:5 in a flask, stirring at the temperature of 25 ℃ for 3 hours at 1200rpm, adding an antistatic function reinforcing agent, wherein the mass ratio of the antistatic function reinforcing agent to the tetraisopropyl di (dioctyl phosphite acyloxy) titanate is 1:4, continuously stirring at the temperature of 25 ℃ for 5 hours at 1200rpm, carrying out centrifugal treatment at the rotating speed of 16000rpm, filtering, and drying filter residues for 5 hours at the temperature of 120 ℃ to obtain the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the antistatic function reinforcing agent is nano silver powder.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Example 3

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and 1200rpm for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The preparation method of the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate comprises the following steps: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol in a mass ratio of 1:5 in a flask, stirring at the temperature of 25 ℃ for 3 hours at 1200rpm, adding an antistatic function reinforcing agent, wherein the mass ratio of the antistatic function reinforcing agent to the tetraisopropyl di (dioctyl phosphite acyloxy) titanate is 1:4, continuously stirring at the temperature of 25 ℃ for 5 hours at 1200rpm, carrying out centrifugal treatment at the rotating speed of 16000rpm, filtering, and drying filter residues for 5 hours at the temperature of 120 ℃ to obtain the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the antistatic function reinforcing agent is a mixture of nano silver powder and nano titanium dioxide powder according to the mass ratio of 1: 1.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Comparative example 3

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and 1200rpm for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The preparation method of the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate comprises the following steps: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol in a mass ratio of 1:5 in a flask, stirring at the temperature of 25 ℃ for 3 hours at 1200rpm, adding an antistatic function reinforcing agent, wherein the mass ratio of the antistatic function reinforcing agent to the tetraisopropyl di (dioctyl phosphite acyloxy) titanate is 1:4, continuously stirring at the temperature of 25 ℃ for 5 hours at 1200rpm, carrying out centrifugal treatment at the rotating speed of 16000rpm, filtering, and drying filter residues for 5 hours at the temperature of 120 ℃ to obtain the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the antistatic function reinforcing agent is a mixture of nano silver powder and nano iron powder according to the mass ratio of 1: 1.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Comparative example 4

The PVC plastic is composed of the following raw materials in parts by weight:

100 parts by weight of PVC, 35 parts by weight of antistatic agent, 1.5 parts by weight of N, N' -ethylene bis stearamide, 2.5 parts by weight of methyl isobutyl carbinol and 1 part by weight of ethoxylated trimethylolpropane triacrylate.

The antistatic agent is functionalized octadecyl trimethyl ammonium chloride, and the preparation method of the functionalized octadecyl trimethyl ammonium chloride comprises the following steps: mixing octadecyl trimethyl ammonium chloride and absolute ethyl alcohol in a mass ratio of 1:10 in a flask, and stirring at the temperature of 25 ℃ and the rpm of 1200 for 2 hours to obtain a mixed solution; adding modified tetraisopropyl di (dioctyl phosphate acyloxy) titanate with the mass of 30% of the mixed solution, stirring at the temperature of 25 ℃ and 1200rpm for 20h, vacuum drying at the temperature of 80 ℃ for 48h, and drying at the temperature of 120 ℃ for 2h to obtain the functionalized octadecyl trimethyl ammonium chloride.

The preparation method of the modified tetraisopropyl di (dioctyl acyloxy phosphite) titanate comprises the following steps: mixing tetraisopropyl di (dioctyl phosphite acyloxy) titanate and absolute ethyl alcohol in a mass ratio of 1:5 in a flask, stirring at the temperature of 25 ℃ for 3 hours at 1200rpm, adding an antistatic function reinforcing agent, wherein the mass ratio of the antistatic function reinforcing agent to the tetraisopropyl di (dioctyl phosphite acyloxy) titanate is 1:4, continuously stirring at the temperature of 25 ℃ for 5 hours at 1200rpm, carrying out centrifugal treatment at the rotating speed of 16000rpm, filtering, and drying filter residues for 5 hours at the temperature of 120 ℃ to obtain the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the antistatic function reinforcing agent is a mixture of nano iron powder and nano titanium dioxide powder in a mass ratio of 1: 1.

The PVC plastic is prepared by the following method:

(1) blending PVC, an antistatic agent, N' -ethylene bis stearamide, methyl isobutyl carbinol and ethoxylated trimethylolpropane triacrylate for 25min according to a formula, wherein the blending temperature is 115 ℃, and the blending rotating speed is 500rpm to obtain a mixture;

(2) and (3) adding the mixture into an extruder to be extruded, and performing injection molding at the extrusion temperature of 165 ℃ to obtain the PVC plastic.

Test example 1

And (3) volume resistivity test: the antistatic performance of the PVC plastic samples of the examples and the comparative examples was tested according to the national standard GB/T15662-1995 method for testing the volume resistivity of conductive and antistatic plastics. Sample size: 80mm × 10mm × 3mm, test environment: 23 +/-2 ℃ and 50% +/-5%; parallel to 5 groups, average.

TABLE 1 antistatic Property test results of PVC plastics

Test example 2

And (3) testing antistatic performance: the PVC plastics samples of the examples and comparative examples were tested according to the method of the public automobile stability acc.to PV3977 for 120s at 23 ℃. And testing in parallel for 20 times, removing abnormal values, and averaging. Note: the standard is less than or equal to 0.3KV (after 120 s).

TABLE 2 test results for PVC plastics (after aging at 90 ℃/500 h)

	After aging at 90 ℃/500h
		Example 1	0.22KV
Comparative example 2	0.43KV
		Example 2	0.20KV
Example 3	0.11KV
		Comparative example 3	0.27KV
Comparative example 4	0.29KV
		Comparative example 1	0.50KV

Comparing examples 1-2 with comparative examples 1-2, it can be seen that the antistatic property of the plastic is enhanced after further modification of octadecyl trimethyl ammonium chloride with modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate; the octadecyl trimethyl ammonium chloride has an antistatic effect, ammonium ions in the ammonium salt have polarity, on one hand, titanium of tetraisopropyl di (dioctyl phosphite acyloxy) titanate in the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate belongs to metal elements, and the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate has certain polarity, can release and absorb electrons, can promote migration and diffusion of the electrons, and reduces the volume resistivity of the plastic; in addition, acyloxy in tetraisopropyl di (dioctyl phosphite acyloxy) titanate belongs to an electron donating group, wherein oxygen atoms have lone pair electrons, and the lone pair electrons are easy to exchange with electrons in the environment, so that the diffusion migration of electrons is promoted, and the volume resistivity is further reduced; the modified ammonium radical of octadecyl trimethyl ammonium chloride and acyloxy (polarity) of tetraisopropyl di (dioctyl phosphite acyloxy) titanate synergistically form a bonding similar to an ionic bond, so that the functions of the two substances exceed simple superposition;

on the other hand, metal atoms of nano silver and nano titanium dioxide in the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate can be used as good carriers of electrons, the reducibility of the metal enables the metal to volatilize electrons, the metal can absorb free electrons in the environment and oxidize the free electrons into atoms after becoming cations, the diffusion and movement of the electrons are promoted once the free electrons lose the original electrons, and the catalytic action can be played to enable the redox action in the short range to be continuously carried out, so that the contribution to the electron migration and diffusion is made; in addition, acyloxy in tetraisopropyl di (dioctyl phosphite acyloxy) titanate has a certain polar effect, and can be combined with nano silver and nano titanium dioxide in an ionic bond form, rather than simply added.

Comparing example 3 with examples 1-2 and comparative examples 3-4, it can be seen that the antistatic property of the plastic is further improved by adopting the modified tetraisopropyl di (dioctyl phosphite acyloxy) titanate prepared by compounding nano silver and nano titanium dioxide; the resistance of the plastic is generated because each atom in the plastic generates scattered waves to electrons, and the difference of the atomic radii of the two substances just causes the scattered waves to have phase difference to the electrons, so that the two scattered waves just cancel each other, and the volume resistivity of the plastic is reduced; and the size of the iron atom makes the superposition cancellation effect of each element atom on the electron scattering wave not as good as that of the nano silver/nano titanium dioxide compound when the iron atom is compounded with the nano silver or the nano titanium dioxide for use, which is related to the phase difference of each atom on the electron scattering wave.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention.