硅烷接枝二元乙丙橡胶对EPDM/MVQ共混物的改性及改性机理探讨  

Modification of EPDM/MVQ with silane-grafting EPM

作　　者：何江红[1] 谢忠麟[1] 

机构地区：[1]北京橡胶工业研究设计院,北京100039

出　　处：《橡胶工业》2001年第1期5-9,共5页China Rubber Industry

摘　　要：探讨了硅烷接枝二元乙丙橡胶 (EPM g S)作相容剂对EPDM/甲基乙烯基硅橡胶 (MVQ)共混物的改性及改性机理。EPM g S是EPM、硅烷偶联剂A 174[γ (甲基丙烯酰脱氧基 )丙基三甲氧基硅烷 ]和过氧化物DCP在布拉本德自记硫化仪中 ,通过高温 (170～ 190℃ )、高剪切 (转子转速为 6 0～ 80r·min-1)热炼而成的。用EPM g S作相容剂 ,可以改善EPDM/MVQ共混物的物理性能、耐热性能 (耐热温度从 15 0℃提高到 170℃ )和高温压缩永久变形性能。红外光谱试验证明 ,EPM g S是硅烷偶联剂A 174接枝到EPM分子链上的产物 ,EPDM与MVQ和EPDM与EPM g S是通过过氧化物交联体系共交联的。The EPDM/MVQ was modified by using the silane grafting EPM (EPM g S) as the compatibilizer and the modification mechanism was discussed.EPM g S was obtained by mixing EPM,silane coupling agent A 174 [γ (methyl acryl deoxy) propyl trimethyl silane] and DCP in a Brabender rheometer at the high temperature (170～190 ℃) and the high shearing (with rotor speed of 60～80 r·min -1 .The physical properties,particularly the heat resistance and the compression set at high temperature of EPDM/MVQ were improved by using EPM g S as compatibilizer.It was found with infra red absorption spectrum that EPM g S was the product of the silane coupling agent A 174 grafted on the EPM molecular chain and the covulcanization of EPDM/MVQ or EPDM/EPM g S was achieved by peroxide crosslinking agent.

关 键 词：硅烷 接枝 二元乙丙橡胶 相容剂 EPDM 甲基乙烯基硅橡胶 共混物 改性 

分 类 号：TQ330[化学工程—橡胶工业]