纳米CaCO_3/β-聚丙烯/短切涤纶纤维三元复合材料的结晶行为  

Crystallization behavior of ternary nano-CaCO_3/β-polypropylene/short polyester fiber composites

作　　者：陈超[1] 林志丹[1] 管子现[1] 徐宝峰[1] 黄卓瑶[1] 

机构地区：[1]暨南大学理工学院材料系,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2013年第1期77-81,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省重大科技专项项目(2010A080804021)

摘　　要：通过挤出共混制备纳米碳酸钙/β-成核聚丙烯/短切涤纶纤维复合材料,用马来酸酐接枝聚丙烯(PP-g-MA)改善相容性.研究了材料中PP的结晶和熔融行为,用修正Jeziorny法、Ozawa法及莫志深法处理了PP的非等温结晶行为.结果表明涤纶纤维和CaCO3能够促进PP的结晶和诱导形成β晶.加入β-成核剂后可得较高β晶含量的复合材料,相容剂对β-成核剂的协同作用使得β晶含量进一步增加.莫志深法能够很好地描叙复合材料中PP的非等温结晶动力学过程,而Jeziorny法和Ozawa法分析的效果不理想.Composition of nano-CaCO3/β-nucleating polypropylene/short polyester fiber composites was prepared by means of extrusion blending, and then modified the compatibility by PP-g-MA. The crystallization and melting behavior were studied. Jeziorny method, Ozawa method and Mo method were used to process the non-isothermal crystallization behavior of PP. The results indicated that polyester fiber and nano-CaCO3 promoted the crystallization of PP and induced β crystal formed. The composites had high β crystal with β nucleating agent added, and the compatibilizer exhibited synergy effect with β-nucleating agent to further increase β crystal. Mo＇s method satisfactorily described the non-isothermal crystallization behavior of PP in the composites, whereas Jeziorny method and Ozawa method failed to do the same ideally.

关 键 词：聚丙烯 涤纶纤维 β-成核剂 结晶行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]