纳米SiO<sub>2</sub>增韧增强聚丙烯的界面效应与逾渗行为

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纳米SiO₂增韧增强聚丙烯的界面效应与逾渗行为

基金项目: 国家杰出青年科学基金项目(59725307);教育部科学技术重点项目(98069, 99198),广东省科技计划项目重大专项(A10702)和广东省自然科学基金项目(990277)

1.
Materials Science Institute Zhongshan University,Guangzhou 510275, China;
2.
Key Laboratory of Polymeric Composite and Functional Materials of the Ministry of Education, Zhongshan University,Guangzhou 510275,China;
3.
State Key Laboratory of Engineering Plastics, The Academy of Sciences of China, Beijing 100080, China

摘要: 报道了聚苯乙烯辐射接枝纳米二氧化硅微粒(SiO₂-g-PS)填充聚丙烯(PP)的增强增韧作用,并从界面效应和逾渗行为的角度对此类复合材料的力学行为进行了分析。结果表明,接枝纳米微粒填充入聚合物时所形成的微粒/聚合物复合颗粒可以整体发挥协同作用,带来较强的界面效应,并有可能导致双逾渗行为,从而有利于发挥纳米微粒的特殊性能。
- 辐射接枝改性 /
- 纳米微粒 /
- 聚丙烯 /
- 界面效应 /
- 逾渗行为
Abstract: The tensile strength and the area under the tensile stress-strain curve of irradiation grafted and nano-silica filled polypropylene are studied to understand the interfacial effects and the percolation behavior induced by the nanoparticles. It is found that the nanoparticle agglomerates has a microstructure consisting of nanoparticles and grafted polymer after irradiation grafting polymerization, and thus a strong interfacial interaction can be established easily between the nanoparticles and matrix. In addition, an effect of double percolation of stress volumes, which might be responsible for the improvement of the tensile properties of the nanocomposites, is discussed in detail.
- irradiation grafting polymerization /
- nanoparticles /
- polypropylene /
- interfacial effect /
- percolation