Maleic anhydride/N-phenylmaleimide/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof

A technology of maleimide and methyl styrene, which is applied in the field of polymer polymerization and can solve problems such as polymer pollution and environmental pollution

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 kind of maleic anhydride / N-phenylmaleimide / α-methylstyrene copolymer microspheres and its preparation method and application

Method used

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  • Maleic anhydride/N-phenylmaleimide/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof
  • Maleic anhydride/N-phenylmaleimide/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof
  • Maleic anhydride/N-phenylmaleimide/alpha-methylstyrene copolymer microsphere as well as preparation method and application thereof

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preparation example Construction

[0038] The second aspect of the present invention provides a kind of preparation method of maleic anhydride / N-phenylmaleimide / α-methylstyrene copolymer microsphere, described method comprises the following steps:

[0039] (1) In an inert atmosphere, the polymerization monomer and the initiator are dissolved in the reaction medium to form a homogeneous solution;

[0040] (2) After the homogeneous solution is subjected to a polymerization reaction to obtain a copolymer emulsion suspension, centrifugal separation obtains the maleic anhydride / N-phenylmaleimide / α-methylstyrene copolymer microspheres;

[0041] Wherein, the polymerized monomer is comonomer I, comonomer II and comonomer III;

[0042] The comonomer I has a structure shown in formula (4)

[0043]

[0044] The comonomer II has a structure shown in formula (5)

[0045]

[0046] The comonomer III has a structure shown in formula (6)

[0047]

[0048] In the present invention, the method of copolymerization is a...

Embodiment 1

[0085] Add 10g of comonomer I, 0.8g of azobisisobutyronitrile, 5.9g of comonomer III, 8.65g of comonomer II and 87.8g of isoamyl acetate into a 500mL three-necked flask. Minutes, the three-neck flask was moved into a 90°C water bath, and reacted for 3 hours. After the reaction was completed, the obtained polymer emulsion suspension was centrifuged at a speed of 2000rad / min for 20 minutes to obtain 17.89g of polymer microspheres A1, which corresponded to polymerization The material yield is 73.5%. The polymer microspheres are 1500 nm in size.

[0086] The polymer microsphere A1 was carried out 1 H NMR measures, and records based on the total molar weight of each structural unit in the polymer, the molar content of the structural unit shown in the formula (1) is 52%, and the molar content of the structural unit described in the formula (2) is 29%, The molar content of the structural unit of formula (3) is 19%.

[0087] Such as figure 1 FI-IR image of the copolymer microspher...

Embodiment 2

[0090] Add 15g of comonomer I, 0.3g of azobisisobutyronitrile, 7g of comonomer III, 8g of comonomer II and 120g of butyl benzoate into a 500mL three-necked flask. The flask was moved into a water bath at 60°C and reacted for 24 hours. After the reaction was completed, the obtained polymer emulsion suspension was centrifuged at a speed of 2000 rad / min for 20 minutes to obtain 18.32 g of polymer microspheres A2, corresponding to a polymer yield of 77 %. The polymer microspheres are 2000 nm in size.

[0091] The polymer microsphere A2 was carried out 1 H NMR measures, and records based on the total molar weight of each structural unit in the polymer, the molar content of the structural unit shown in the formula (1) is 48%, and the molar content of the structural unit described in the formula (2) is 30m%, The molar content of the structural unit of formula (3) is 22%.

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Abstract

The invention relates to the field of high-molecular polymerization, and discloses a maleic anhydride / N-phenylmaleimide / a-methyl styrene copolymer microsphere as well as a preparation method and an application thereof. A copolymer in the copolymer microsphere comprises a structural unit shown in a formula (1), a structure shown in a formula (2) and a structural unit shown in a formula (3), based on the total molar weight of each structural unit of the copolymer, the molar content of the structural unit shown in the formula (1) is 30-52%, the molar content of the structural unit shown in the formula (2) is 5-30%, and the molar content of the structural unit shown in the formula (3) is 20-45%. The copolymer microsphere has the advantages of clean surface, uniform particle size and simple preparation process, and can be used as a heat-resistant modifier for polymers, especially polypropylene, thereby enhancing the heat-resistant temperature of the polymers.

Description

technical field [0001] The invention relates to the field of polymer polymerization, in particular to a maleic anhydride / N-phenylmaleimide / a-methylstyrene copolymer microsphere and a preparation method and application thereof. Background technique [0002] In the prior art, most copolymers containing maleic anhydride are prepared by solution or traditional precipitation polymerization. Shen Rong et al. disclosed in "Research on Styrene-Maleic Anhydride Copolymerization in Different Solvents" that maleic anhydride and styrene were reacted in ethyl acetate and N,N-dimethylformamide. After the reaction was completed, 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"....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/08C08F222/40C08F212/12C08L35/06C08L23/12
CPCC08F222/08C08F212/12C08L23/12C08L2205/18C08L2201/08C08F222/40C08L35/06
Inventor 刘振杰张洁宋文波邹发生
Owner CHINA PETROLEUM & CHEM CORP
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