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Method for synthesizing N-phenylmaleimide/maleic anhydride binary copolymer

A technology of maleic anhydride binary copolymer and maleimide, which is applied in the field of polymer heat-resistant modifiers, can solve problems such as unstable quality, and achieve the effects of easy post-processing, small investment, and large returns

Active Publication Date: 2015-02-18
贵州凯科特材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for synthesizing N-phenylmaleimide / maleic anhydride binary copolymer (N-PMI / MAH), and to solve the problem that the heat-resistant modifier is only used for resistance Heat-modified PVC, ABS and other general-purpose plastics fill the gaps of heat-resistant modified PA, PPO and other engineering plastics and the complex process and unstable quality of the existing technology.

Method used

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  • Method for synthesizing N-phenylmaleimide/maleic anhydride binary copolymer
  • Method for synthesizing N-phenylmaleimide/maleic anhydride binary copolymer
  • Method for synthesizing N-phenylmaleimide/maleic anhydride binary copolymer

Examples

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Effect test

Embodiment 1

[0018] Add 174g of N-PMI, 49g of MAH and 250ml of xylene solvent into a 1000ml reaction kettle, pass in nitrogen gas, discharge the air in the kettle, raise the temperature to about 65°C, stir for 50-70min to form a homogeneous solution, quickly raise the temperature to about 95°C, add 0.5g dicumyl peroxide, raise the temperature to about 130°C, keep the pressure constant, and react for 3h. After the end, the temperature was raised until the residual solvent and the monomer evaporated, and then filtered and dried to obtain a pale yellow granular product.

[0019] Depend on figure 1 The infrared spectrum of the N-PMI / MAH binary copolymer can be seen at 3030cm -1 The place is the stretching vibration absorption peak of C-H on the benzene ring in the N-phenylmaleimide unit, at 1449cm -1 、1496 cm -1 and 1599 cm -1 The spectrum peak at is the vibration absorption peak of the benzene ring skeleton C-C in the N-phenylmaleimide unit, at 754cm -1 and 698cm -1 is the out-of-plane ...

Embodiment 2

[0022] Add 130g of N-PMI, 49g of MAH and 250ml of xylene solvent into a 1000ml reaction kettle, pass in nitrogen gas, discharge the air in the kettle, raise the temperature to about 65°C, stir for 50-70min to form a homogeneous solution, quickly raise the temperature to about 95°C, add 0.5g dicumyl peroxide, raise the temperature to about 130°C, keep the pressure constant, and react for 3h. After the end, the temperature was raised until the residual solvent and the monomer evaporated, and then filtered and dried to obtain a pale yellow granular product.

Embodiment 3

[0024] Add 72g of N-PMI, 49g of MAH and 250ml of xylene solvent into a 1000ml reaction kettle, blow in nitrogen, discharge the air in the kettle, raise the temperature to about 65°C, stir for 50-70min to form a homogeneous solution, quickly raise the temperature to about 95°C, add 0.5g dicumyl peroxide, raise the temperature to about 130°C, keep the pressure constant, and react for 3h. After the end, the temperature was raised until the residual solvent and the monomer evaporated, and then filtered and dried to obtain a pale yellow granular product.

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Abstract

The invention discloses a method for synthesizing an N-phenylmaleimide / maleic anhydride binary copolymer. The method is characterized by comprising the following steps: stirring and dissolving mixed raw materials at the temperature of 50 to 70 DEG C and the pressure of 101.3 KPa for 50 to 70 minutes to obtain a mixed liquid; adding a solvent, heating to 90 to 110 DEG C, adding an initiator, heating to 130 to 160 DEG C, keeping the temperature and the pressure unchanged, reacting for 1 to 6 hours, keeping the temperature and the pressure unchanged after the reaction is completed, heating to boiling, cooling, filtering, and drying to obtain a finished product, wherein the mixed raw materials comprise 40 to 90 percent of N-phenylmaleimide and 15 to 40 percent of maleic anhydride in percentage by mass. The copolymer has high heat resistant modification performance, can be used as a general plastic heat resistant modifier for PVC (Polyvinyl Chloride), ABS (Acrylonitrile-Butadiene-Styrene) and the like, and can also be used as a heat resistant modifier of engineering plastics, such as PA (Polyamide) and PPO (P-Polyphenylene Oxide); at present, the heat resistant modifier of the engineering plastics, such as special plastics, is too expensive, so that the heat resistant modifier is suitable for large-scale popularization.

Description

technical field [0001] The invention belongs to the technical field of polymer heat-resistant modifiers, and relates to a method for preparing a copolymer, in particular to a method for synthesizing an N-phenylmaleimide / maleic anhydride binary copolymer. Background technique [0002] Heat resistance is one of the most important properties of polymer materials. Imide polymers have received widespread attention because of their good heat resistance due to their five-membered rings in their structures. As one of them, N-phenylmaleimide is a new type of monomer developed in recent years to improve the heat resistance of the resin matrix. N-phenylmaleimide / maleic anhydride binary copolymer (N-PMI / MAH) is due to the introduction of N-phenylmaleimide (N-PMI) and maleic anhydride (MAH) into the matrix , The increase of the imide five-membered ring structure in the polymer molecular chain, the introduction of maleic anhydride polar reactive functional groups, and the heat resistance...

Claims

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Application Information

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IPC IPC(8): C08F222/40C08F222/06C08F2/06C08L77/02C08L35/00
Inventor 何敏赵婉张景中张丽刘渝杨荣强粟多文明星星高京吴俊杨廷国刘小柱郑红开谭兴霞
Owner 贵州凯科特材料有限公司
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