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空心微珠填充聚丙烯复合材料的显微原位拉伸试验观察分析

, PP. 51-57

Keywords: 空心微珠,聚丙烯,原位观察,增强增韧,能量耗散理论

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Abstract:

无机刚性空心微珠颗粒填充聚丙烯材料的研究结果显示,空心微珠颗粒的加入可以同时改善其韧性、强度和刚性。本文中采用显微原位拉伸试验,对空心微珠/聚丙烯复合材料试样受拉伸过程中裂纹的产生、发展、终止和材料的破坏行为进行了动态原位观察分析。试验结果表明,分散相颗粒能有效地引发大量微小裂纹,吸收大量能量,并可以成功阻碍小裂纹的扩展,使裂纹不致形成破坏性开裂,改善复合材料的韧性,并使复合材料的强度同时得到提高。该试验结果为无机刚性颗粒在聚合物中作用的能量耗散理论提供了有力的试验支持。

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