【摘要】 用经过不同表面处理的玻璃微珠填充高密度聚乙烯 ,获得不同界面性能的复合材料。拉伸实验结果显示弹性模量和拉伸强度都随应变率的提高而提高。如果界面粘结强度低 ,复合材料的拉伸强度低于纯基体的拉伸强度。反之 ,复合材料的拉伸强度将提高。然而 ,强界面复合材料的冲击韧性最低。分析表明 ,如果界面很弱 ,由于界面过早开裂形成的空洞导致拉伸强度的降低。当界面粘结很强时 ,冲击韧性降低。为获得良好性能的复合材料 ,必须使界面的粘结强度适中更多还原

【Abstract】 By adding glass beads treated with three different coupling agents into high density polyethylene, composites with different interfacial adhesive strengths were obtained Through tensile tests, both the tensile strength and Young’s modulus were found to be increased with increases in loading rates For materials with weaker interfacial adhesion, the composite will have tensile strength lower than that of the pure matrix Yet for materials with stronger interfacial adhesion the composite will have higher tensile strength The results of impact tests showed a decrease in impact toughness for composites using strong interfacial binding materials Analysis showed that weak interface will result in early interfacial debonding, forming microvoids and thus deteriorated mechanical properties But too strong an interface will create high stress triaxiality in the matrix which causes a decrease of impact toughness Therefore, proper compromise has to be taken to get optimal mechanical properties for rigid particle filled composites更多还原