原位成纤复合法改善聚丙烯的力学性能  

Improvement of mechanical properties of polypropylene by in-situ fibrillation

作　　者：孙显茹[1] 王占杰[1] 刘祥贵[1] 张昊[1] 吴其晔[1] 

机构地区：[1]青岛科技大学,教育部橡塑材料与工程重点实验室,山东青岛266042

出　　处：《合成树脂及塑料》2011年第3期58-61,共4页China Synthetic Resin and Plastics

基　　金：国家自然科学基金资助项目(50273016,50390090,50573037)

摘　　要：采用原位成纤复合法制备了均聚聚丙烯(PP-H)/聚对苯二甲酸乙二酯(PET)原位成纤复合材料,研究了PET原位微纤化对PP-H力学性能的影响。实验采用的设计工艺可实现PET在PP-H基体中原位微纤化;原位生成的PET纤维对PP-H力学性能的影响呈各向异性,表现为拉伸及弯曲强度提高,冲击强度下降,改善效果受PET微观形态的影响:增大表观拉伸比和添加少量增容剂有利于形成PET微纤,同时,复合试样内PET的形态也受再加工注塑温度的影响。The authors prepared homo-polypropylene/polyethylene terephthalate （PP-H/PET） composites through in-situ fibrillation and studied influences of in-situ microfibrillation of PET on the mechanical properties of PP-H. The design technology adopted in the experiment of the present work was available for realizing in-situ microfibrillation of PET in PP-H matrix. The PET micro-fibers formed in-situ had anisotropic impact on PP-H＇s mechanical properties, leading to an enhancement in tensile and flexural strength but a reduction in impact strength of the latter. The improvement effect was affected by the micromorphology of the PET fibers in PP-H/PET composites. Increasing apparent stretching ratio or adding a small amount of compatiblizer was favorable to formation of the PET micro-fibers. In addition, the morphology of the PET micro-fibers in the PP-H/PET composites was dependent on injection molding temperature of the reprocessing.

关 键 词：聚丙烯 聚对苯二甲酸乙二酯 原位成纤 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]