三元乙丙橡胶/聚丙烯体系动态硫化速率及热塑性弹性体定伸应力的影响因素  

Effect factors of dynamic curing rate of ethylene-propylene-diene monomer/polypropylene systems and modulus of thermoplastic elastomer

作　　者：程思怡[1] 邵禹通 周峰[1] 严海彪[1] 

机构地区：[1]湖北工业大学材料科学与工程学院绿色轻工材料湖北省重点实验室,武汉430068

出　　处：《合成橡胶工业》2016年第3期192-196,共5页China Synthetic Rubber Industry

摘　　要：采用转矩流变仪制备了动态硫化三元乙丙橡胶(EPDM)/聚丙烯(PP)热塑性弹性体(TPV),考察了EPDM/PP共混物的硫化速率及TPV定伸应力的影响因素。结果表明,提高混炼温度、转速及减少EPDM充油量可以提高硫化速率,当混炼温度为195℃、转速为50 r/min、充油质量分数为30%时,TPV的定伸应力达到最大值;随着低双键含量的EPDM(LEPDM)含量的增加,EPDM/PP共混物的硫化速率和TPV的定伸应力逐渐减小,当LEPDM质量分数达到60%时,硫化速率和定伸应力趋于稳定。The dynamic vulcanized ethylene-pro- pylene-diene monomer（EPDM）/polypropylene （PP） thermoplastic elastomer （TPV） was prepared by using torque rheometer, and effect factors of dynam- ic curing rate of the EPDM/PP systems and modulus of the TPV were investigated. The results showed that dynamic curing rate of EPDM/PP systems in- creased with increasing mixed temperature, rotation speed and decreasing content of naphthenic oil. Modulus reached a maximum when the temperaturewas 195 ℃ , rotation speed was 50 r/min and mass fraction bf naphthenic oil was 30%. Dynamic curing rate of the blends and modulus of the TPV decreased first and then tended to be stable with increasing content of EPDM with lower double bond to 60%.

关 键 词：三元乙丙橡胶 聚丙烯 转矩流变仪 动态硫化 热塑性弹性体 硫化速率 定伸应力 

分 类 号：TQ334.9[化学工程—橡胶工业]