摘要
用机械共混的方法制备了一系列不同EPDM粘度的PP/EPDM共混物,对其力学性能和结晶行为进行了表征,并用扫描电子显微镜(SEM)研究了共混物冲击样条的断口形态。实验结果表明,EPDM粘度对共混物的冲击强度有较大影响,随着EPDM粘度的增大,共混物的冲击强度出现极大值,而结晶行为的变化则较小,研究共混物冲击样条的断口形态发现,共混物的冲击强度随EPDM粒径的变化出现极大值。
A series of blends of PP/EPDM with different EPDM mooney viscosity were prepared by a twin-screw extruder and their mechanical properties and crystalization behaviour were characterized. The morphology of the frat :ured surface of the blends was studied by SEM. The results show that the mooney viscosity of EPDM strongly affects the impact strength of the blends. The impact strength of the blends increases with the increasing mooney viscosity of rubbers and reaches maximum. The crystalization behaviour of the blends is lightly affected by the EPDM mooney viscosity. Dependence of impact strength on the size and size distribution of EPDM was also studied. When the particle size increases,the impact strength of the blends increases and reaches the maximum.
出处
《工程塑料应用》
CAS
CSCD
北大核心
1995年第4期21-26,共6页
Engineering Plastics Application
关键词
共混物
粘度
冲击强度
聚丙烯
乙烯
丙烯
高聚物
PP/EPDM blend, mooney viscosity of EPDM, morphology, impact strength
