摘要
在硅橡胶(MVQ)和三元乙丙橡胶(EPDM)及其共混物中加入交联剂二苯甲烷双马来酰亚胺(BMI),研究了BMI对MVQ、EPDM及其共混物的硫化特性和力学性能的影响。EPDM的硫化活性低,正硫化时间是MVQ的3倍,共混物的共硫化性和相容性不佳。BMI能降低EPDM的活化温度,提高EPDM的硫化速度,同时减慢MVQ的硫化速度,从而使二者的硫化速度趋于接近。在MVQ/EPDM共混物中,BMI能使MVQ和EPDM在较低温度下同步反应,实现两组分的共硫化,改善MVQ与EPDM的相容性,提高了MVQ/EPDM共混物的力学性能。
Diphenyl-methane bismaleimide （BMI）was added to methyl-vinyl silicone rubber （MVQ）, ethylenepropylene-diene monomer rubber（EPDM）and their blends. The effects of BMI on the vulcanization and mechanical properties were studied. EPDM has the lower vulcanizing activity and its optimum vulcanizing time is two times longer than of MVQ. The coulcanization and compatibility between MVQ and EPI）M are very poor. BMI can promote the vulcanization of EPDM and enhance the vulcanizing speed. Meanwhile, BMI depresses the vulcanizing speed of MVQ. Thereby, the vulcanizing speeds of MVQ and EPDM can approach closely as MBI content： increases. In MVQ/ EPDM blend, BMI made parts of EPDM and MVQ to vulcanize simuhaneously at about 140 ℃ and promoted the co-vulcanization in the blend, consequently. The compatibility between MVQ and EPDM is improved and the mechanical properties of the blend increase.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第3期98-102,共5页
Polymer Materials Science & Engineering
关键词
硅橡胶
三元乙丙橡胶
共混物
共硫化
力学性能
silicone rubber
EPDM
blending
co-vulcanization
mechanical properties
