Improvement of tensile properties of nano-SiO2/PP composites in relation to percolation mechanism
Improvement of tensile properties of nano-SiO2/PP composites in relation to percolation mechanism
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DOI：
10.1016/s0032-3861(00)00741-2
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发表时间：
2001-03
期刊：
影响因子：
4.6
通讯作者：
M. Rong;M. Zhang;Yongjia Zheng;H. Zeng;K. Friedrich
中科院分区：
文献类型：
--
作者：
M. Rong;M. Zhang;Yongjia Zheng;H. Zeng;K. Friedrich
采用传统的复合技术，通过辐照接枝聚苯乙烯，制备了低含量纳米SiO_2负载聚丙烯复合材料。拉伸试验中观察到的强化和增韧效应表明，界面应力传递效率高。根据逾渗概念讨论了改性纳米粒子在提高纳米复合材料拉伸性能中的作用。屈服区的双重渗流被提出来解释的具体影响所产生的纳米SiO2颗粒在低填料加载制度。
Low nano-silica loaded polypropylene composites are produced by conventional compounding technique in which the nanoparticles are grafted by polystyrene using irradiation beforehand. A high interfacial stress transfer efficiency is demonstrated by both strengthening and toughening effects perceived in tensile tests. The role of the modified nanoparticles in improvement of tensile properties of the nanocomposites is discussed in terms of percolation concept. A double percolation of yielded zones is presented to explain the specific influence generated by the nano-SiO2particles at low-filler loading regime.