MORPHOLOGY AND MECHANICAL PROPERTIES OF POLY(ETHYLENEOCTENE) COPOLYMERS OBTAINED BY DYNAMIC PACKING INJECTION MOLDING

作     者：张琴 傅强 

作者机构：Department of Polymer Science and EngineeringSichuan UniversityState Key Laboratory of Polymer Materials Engineering 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2012年第30卷第4期

页      面：603-612页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the special funds for Major State Basic Research Projects of China (No.2011CB606006) Program for the New-Century Excellent Talents of Ministry of Education of China(NCET-10- 0580) 

主　　题：Poly(ethylene-octene) Copolymer Mechanical properties Morphology Reinforcement. 

摘      要：The morphology and mechanical properties of poly（ethylene-octene） copolymers （POE） obtained by dynamic packing injection molding were investigated by mechanical tests, differential scanning calorimetry （DSC）, fourier transform infrared spectroscopy （FT-IR） and scanning electron microscopy （SEM）. The mechanical tests found that only POE with low octene content and high molecular weight show apparent response for external shear field. Further investigation has been done by DSC, FT-IR, and SEM in order to make clear the reason of that phenomenon. Finally, the hypothetical mechanism of POE microstructure formation under shear field has been proposed. For POE with low octene content and high molecular weight, orientation degree and mechanical properties both increase substantially under shear field. For POE with low octene content and low molecular weight, orientation degree and crystallinity increase under shear field, but it is not dramatically benefit for the mechanical properties. For POE with high octene content and high molecular weight, the shear field has little effect on the morphology and mechanical properties.