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Methylstyrene multi-component copolymer composite microsphere as well as preparation method and application thereof

A technology of methyl styrene and multiple copolymers, which is applied in the field of composite microspheres of methyl styrene multiple copolymers and its preparation, can solve the problems of polymer surface pollution and environmental pollution, and achieve the effect of improving mechanical properties

Active Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the pollution problems on the surface of the polymer and the environment caused by the addition of auxiliary agents such as reaction solvents and stabilizers in the prior art, Provide a composite microsphere of methyl styrene multi-polymer copolymer and its preparation method and application. The surface of the composite microsphere provided by the present invention is clean and pollution-free, and the microsphere particles are uniform, and can be used as a toughening agent for polymerization In the material, the improvement of the performance of the polymer can be achieved

Method used

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  • Methylstyrene multi-component copolymer composite microsphere as well as preparation method and application thereof
  • Methylstyrene multi-component copolymer composite microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Add 10.5g of maleic anhydride, 0.91g of azobisisobutyronitrile, 5g of divinylbenzene, 11.8g of α-methylstyrene and 80g of isoamyl acetate into a 500mL three-necked flask. After the materials are mixed evenly, blow nitrogen gas for 20 Minutes, move the three-necked flask into a 70°C water bath, react for 3 hours, then add 2.58g of vinyl acetate and 3.12g of styrene to the three-necked flask, and continue to react for 2 hours. After the reaction is completed, pass the obtained polymer emulsion suspension through a centrifuge to After centrifugation at 2000 rad / min for 20 minutes, 15.07 g of polymer solid A1 was obtained, corresponding to a polymer yield of 55.2%.

[0085] After testing, the particle size of the polymer microspheres measured at the end of the first step reaction was 1700 nanometers, and the particle size of the polymer microspheres was 2000 nanometers at the end of the first polymerization reaction. The electron microscope photo shows that the polymer is a ...

Embodiment 2

[0089] Add 11g of maleic anhydride, 0.9g of azobisisobutyronitrile, 0.5g of divinylbenzene, 11.8g of α-methylstyrene and 70g of butyl benzoate into a 500mL three-necked flask. Minutes, move the three-necked flask into a 70°C water bath, react for 3 hours, then add 1.72g vinyl acetate and 2.08g styrene to the three-necked flask, continue to react for 2 hours, after the reaction is completed, pass the obtained polymer emulsion suspension through a centrifuge to Centrifuge at 2000 rad / min for 20 minutes to obtain 12.55 g of polymer solid A2, corresponding to a polymer yield of 49.4%.

[0090] After testing, the particle diameter of the polymer microspheres is 1200 nanometers. The core of the resulting polymer microspheres is a cross-linked polymer of maleic anhydride and α-methylstyrene, and the shell is a linear polymerization of α-methylstyrene, styrene, vinyl acetate, and maleic anhydride things. The molar ratio of maleic anhydride to α-methylstyrene in the core is 1:0.9, th...

Embodiment 3

[0092] Add 9g of maleic anhydride, 0.7g of azobisisobutyronitrile, 1.5g of divinylbenzene, 10g of α-methylstyrene and 87.8g of butyl butyrate into a 500mL three-necked flask. Minutes, move the three-necked flask into a 70°C water bath, react for 3 hours, then add 2.15g vinyl acetate and 2.6g styrene to the three-necked flask, continue to react for 2 hours, after the reaction is completed, pass the obtained polymer emulsion suspension through a centrifuge to After centrifugation at 2000 rad / min for 20 minutes, 15.76 g of polymer solid A3 was obtained, corresponding to a polymer yield of 59.8%.

[0093] After testing, the particle diameter of the polymer microspheres is 1400 nanometers. The core of the resulting polymer microspheres is a cross-linked polymer of maleic anhydride and α-methylstyrene, and the shell is a linear polymerization of α-methylstyrene, styrene, vinyl acetate, and maleic anhydride thing. The molar ratio of maleic anhydride to α-methylstyrene in the core i...

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Abstract

The invention relates to the field of polymer preparation, and discloses a methylstyrene multi-component copolymer composite microsphere, and a preparation method and an application thereof. The method comprises the following steps: S1, in an inert atmosphere, dissolving maleic anhydride, alpha-methylstyrene, a cross-linking agent and an initiator in a reaction medium to form a homogeneous solution; and S2, after carrying out a first polymerization reaction on the homogeneous solution, adding vinyl acetate and styrene, carrying out a second polymerization reaction to obtain a copolymer emulsion suspension, and carrying out solid-liquid separation on the copolymer emulsion suspension to obtain the methylstyrene multi-component copolymer composite microsphere. The composite microsphere provided by the invention is clean and pollution-free in surface and uniform in microsphere particles, can be used as a toughening agent in a polymer, and can improve the performance of the polymer.

Description

technical field [0001] The invention relates to the field of high molecular polymers, in particular to a composite microsphere of a multi-methylstyrene copolymer, a preparation method and application thereof. Background technique [0002] In the prior art, copolymers containing maleic anhydride are mostly prepared by solution or traditional precipitation polymerization. In the article "Research on the Copolymerization of Styrene-Maleic Anhydride in Different Solvents", Shen Rong et al. reacted maleic anhydride and styrene in ethyl acetate and N,N-dimethylformamide, and the reaction After completion, a polymer of maleic anhydride and styrene was prepared using ethanol as a precipitating agent (Journal of Wuhan Engineering University, 2019, 41(1): 65-68). [0003] Liu Tingguo and others synthesized styrene-maleic anhydride copolymers by precipitation polymerization in toluene in "Synthesis of Low Molecular Weight Styrene-Maleic Anhydride Alternating Copolymers". [0004] Shi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F267/04C08F218/08C08F212/08C08F212/12C08F222/08C08F212/36C08F2/14C08L23/00C08L51/00
CPCC08F257/02C08F267/04C08F212/12C08F222/08C08F2/14C08L23/02C08L2205/18C08F218/08C08F212/08C08F212/36C08L51/003
Inventor 宋文波刘振杰张洁张晓萌
Owner CHINA PETROLEUM & CHEM CORP
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