| 纳米SiO2表面接枝聚合改性及其聚丙烯基复合材料的力学性能 |
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| 引用本文： | 吴春蕾,章明秋,容敏智.纳米SiO2表面接枝聚合改性及其聚丙烯基复合材料的力学性能[J].复合材料学报,2002,19(6):61-67. |
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| 作者姓名： | 吴春蕾 章明秋 容敏智 |
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| 作者单位： | 中山大学材料科学研究所,聚合物复合材料及功能材料教育部重点实验室,广州,510275 |
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| 基金项目： | 教育部科学技术重点项目(99198)，广东省自然科学基金项目(990277)，广东省自然科学基金研究团队项目，广东省科技厅十五重大专项(A10172) |
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| 摘 要： | 分别用苯乙烯和丙烯酸乙酯对纳米SiO2进行辐照接枝聚合改性,通过两步熔融共混工艺与聚丙烯(PP)共混制备了SiO2/PP复合材料。研究了SiO2添加量和表面接枝不同聚合物的SiO2对复合材料力学性能的影响。结果表明,接枝改性的SiO2对PP有较好的增强增韧效果;拉伸断面观察显示复合材料韧性的提高主要由基体剪切屈服所致。对断面上个别较大团聚体分析发现,经辐照接枝聚合改性的纳米粒子团聚体的结构变得更加紧凑、结实,且随粒子表面聚合物的性质不同,团聚体与基体树脂的界面粘结也随之不同,导致其拉伸破坏形状有所差异,但与基体树脂的界面粘结都得到较好的改善。
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| 关 键 词： | 聚丙烯 纳米SiO2 复合材料 辐照接枝 |
| 文章编号： | 1000-3851(2002)06-0061-07 |
| 收稿时间： | 2001-06-04 |
| 修稿时间： | 2001年6月4日 |
GRAFTING POLYMERIZATION ONTO NANOSILICA AND ITS EFFECT ON MECHANICAL PROPERTIES OF PP COMPOSITES |
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| WU Chunlei,ZHANG Mingqiu,RONG Minzhi.GRAFTING POLYMERIZATION ONTO NANOSILICA AND ITS EFFECT ON MECHANICAL PROPERTIES OF PP COMPOSITES[J].Acta Materiae Compositae Sinica,2002,19(6):61-67. |
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| Authors: | WU Chunlei ZHANG Mingqiu RONG Minzhi |
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| Affiliation: | Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Materials Science Institute, Zhongshan University, Guangzhou 510275, China |
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| Abstract: | To modify the surface of nano-SiO2, polytyrene and polyethylacrylate were grafted onto the particles through irradiation grafting polymerization, respectively. Mechanical testing of the modified nanosilica filled polypropylene (PP) composites reveals the significant strengthening and toughening effects of the treated nanoparticles on the matrix resin. It is believed that the extensive shear deformation of PP induced by the modified nanosilica is responsible for the improvement of the composites toughness. Microscopic observation further demonstrates that the modified nanoparticle aggregates become more compact due to the grafting polymer chains, which in turn provides an enhanced interfacial adhesion between the fillers and the matrix. |
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| Keywords: | polypropylene nanosilica composites irradiation grafting |
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