Processing Machinery
4 조회수
Poor thermal stability of methyl methacrylate-butadiene-styrene copolymer during processing
문제 현상
Methyl methacrylate-butadiene-styrene copolymer has poor thermal stability during processing; performance decreases significantly after repeated processing, with severe degradation
원인 분석
Insufficient antioxidant addition or improper type
Processing temperature too high (exceeding the 180-220°C upper limit) accelerates degradation
Excessive screw shear accelerates thermo-oxidative degradation
Regrind ratio too high, degradation accumulates
Antioxidants fail at high temperature
해결 방법
Increase antioxidant addition amount
Reduce processing temperature to a reasonable value of 180-220°C
Reduce screw rotation speed to reduce shear
Reduce regrind ratio ≤15%
Select antioxidants with good high-temperature stability
핵심 요약
Thermal stability needs to start from antioxidants and temperature control
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!