丙烯／α－烯烃共聚物的结晶行为及临界结晶序列长度研究

Crystalline Behavior and Critical Crystalline Sequence Length of Propylene/α-Olefin Copolymer

丙烯／α－烯烃共聚物的结晶行为及临界结晶序列长度研究陈辉，王建国，张学全，庞德仁，黄葆同（中国科学院长春应用化学研究所，长春，１３００２２）关键词丙烯／α－烯烃共聚物，结晶行为，临界结晶序列长度聚丙烯（ＰＰ）是最重要的通用塑料之一，但其低温抗冲性能差...

The melting points(Tm),crystalline temperature(Tc)and crystallinity(Xc)of propylene/α-olefin(pentene-1,octene-1 and decene-1)copolymers have been investigated. The results show that the Tm,Tc and Xc of the copolymers are lower than those of propylene homopolymer,indicating that lower α-olefin incorporation in copolymer has strongly hampered the crystallization of propylene.From critical crystalline sequence length of several propylene/α-olefin copolymers,it can be seen that a long chain α-olefin has much stronger effect on crystallization of PP than a short α-olefin does.