Polyimide semi-interpenetrating network resin and its prepn. method

Abstract

The invention belongs to the domain of the polymers technology and is the polyimide half interpenetrating networks pitch and the producing process. With the method of the dry mixing, the wet mixing or the melt mixing, the tri-benzene bis ether polyimide with thermal plasticity is combined with the thermoset bi-smaleimide, then the half interpenetrating networks is formed by the hot pressing. The dosage of the tri-benzene bis ether polyimide is 5-90 percentage and 10-70 percentage optimally. The mixed pitch can be shared with other filler material such as the fraphite, the supramoly, the silicon dioxide, the titanium dioxide, the polyetrafluoroethylene, the carbon fiber and the fibergals in order to improve the ability of the engineering plastic and to satisfy the consumer. Using the high tenacity of the tri-benzene bis ether polyimide with thermal plasticity to reinforce the rigid cross linked structure of the bismaleimide, we can gain the half interpenetrating of the high tenacity and the intension; the material requirement of the different capability needed by a vatiety of purpose can be satisfied by the different mixing methods.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to engineering plastics, in particular to a polyimide semi-interpenetrating network resin and a preparation method thereof. Background technique [0002] Polyimide is currently the engineering plastic with the highest temperature, which can be divided into two types: thermosetting and thermoplastic. Thermoplastic polyimide is easy to process and has outstanding comprehensive performance; thermosetting polyimide has a high service temperature but is relatively brittle. Combining thermoplastic polyimide and thermosetting polyimide can complement each other to obtain engineering plastics with comprehensive properties. Contents of the invention [0003] The present invention uses thermoplastic triphenyl ether type polyimide and thermosetting bismaleimide as raw materials, combines them through dry mixing, wet mixing or melt mixing, and aims to provide a semi-interpenetrating ...

AI Technical Summary

Problems solved by technology

Thermoplastic polyimide is easy to process and has outstanding comprehensive performance; thermosetting polyimide has a high service temperature but is brittle

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