The Toughening Mechanism of Polyamide 6/EPDM-M/Nano-CaCO3 Ternary Composites with Sandbag Microstructure
Ternary composites of Polyamide 6 (PA6), the mixture of Maleated and Unmaleated Ethylene Propylene Diene terpolymer rubber (named EPDM-M), and nano Calcium Carbonate (nano-CaCO3) were prepared by one-step and two-step compounding routes. The toughness of the composites was tested by impact test. The microstructure morphology of impact surface and etched impact surface was investigated through scanning electron microscope (SEM). The result shows that toughness of the ternary composites with sandbag microstructure was 270 ％ higher than neat PA6. The SEM morphology shows that strongly elongated microfibrils and deformation are formed in ternary composite with sandbag microstructure, which cause larger shear yielding and crazes in the surrounding matrix to dissipate more impact energy. Additionally, strong ligaments are observed at the crack tip, which could promote plastic deformation and consumption of fracture energy.
Polyamide 6 sandbag microstructure ternary composites toughening mechanism
Yong-jie Wang Yu-xin Dong Yan-qin Shi Si Chen Xu Wang
College of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou 310014,Peoples Republic of China
国际会议
合肥
英文
1523-1527
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）