EPDM/聚乙烯共混体系结晶行为的研究

Study on the Crystalline Behaviour of EPDM/Polyethylene Blends

采用DSC法研究EPDM／聚乙烯共混体系的结晶行为。研究结果表明：随着无定形EPDM含量的增加，共混体系的结晶峰值温度（Tc）降低，而且半结晶期（tn）减小，晶体尺寸分布变窄，结晶速率加快，结晶速率的快慢与聚合物的分子链结构和EPDM形态关系密切。

The crystalline behaviour of EPDM/polyethylene blends was studied with DSC method. With the increasing of amorphous EPDM, the crystalline peak temperature(Tc) decreased, the semi-crystalline time(tn) reduced, the crystal size distribution narroweddown and the crystalline speeded up. The crystalline rates were related to molecularchat.n structure of polymers and EPDM morphology.