成核剂对聚丙烯熔融行为的影响

INFLUENCE OF NUCLEATING AGENTS ON THE MELTING BEHAVIOR OF ISOTACTIC POLYPROPYLENE

成核剂对聚丙烯熔融行为的影响陈彦徐懋（中国科学院化学研究所高分子物理开放实验室北京１０００８０）关键词成核剂，聚丙烯，平衡熔点聚合物的熔融过程受分子量大小、分子量分布、分子链构型（等规度、分子结构单元的键接序列）、不同的结晶晶型、不同的热历史等...

The equilibrium melting temperature (T°m) of isotactic polypropylene (iPP) was studied by DSC technique for samples with different nucleating agents including calcium carbonate(CA), terephthalic acid(DB) and glutaric acid(WA). The (T°m) values of αmodification iPP crystals obtained for samples with different nucleating agents were found to be within a narrow temperature range of 488～492K, almost independent on the nucleating agents.