MECHANICAL PERFORMANCE OF NANO-CaCO_3 FILLED POLYSTYRENE COMPOSITES

作     者：Yun Gao Luqi Liu Zhong Zhang 

作者机构：National Center for Nanoscience and Technology Beijing 100190 China 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2009年第22卷第6期

页      面：555-562页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 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：sponsored by the National Key Research Program of China (No2006CB932304) a Key International Collaboration Project (No2008DFA51220) of the China Ministry of Science and Technology a Key Item ofthe Knowledge Innovation Project of Chinese Academy of Sciences (NoKJCX1YW07) 

主　　题：nanocomposites nanoparticles polymers mechanical properties debonding 

摘      要：Nano-CaCO3 incorporated polystyrene composites are compounded by twin-screw extrusion. Tensile and compact tensile tests show that the strength and toughness of polystyrene are decreased after the addition of nano-CaCO3 particles. Fracture surface analysis suggests that the defects induced by interfacial debonding and nano-filler agglomerations would be the key factors responsible for the declined strength and toughness. Nevertheless, it has to be stated, if the applied stress is lower than the ultimate strength, the rigid nanoparticles would still stiffen the polymer molecules, and resist polymer chain mobility. Hence, the improved tensile modulus and creep resistance can be obtained with the increasing contents of nanoparticles.