环氧树脂/贝壳粉复合材料的自由体积特性的正电子湮没研究  

Positron annihilation study on free volume properties in epoxy resin/shell particles composites

作　　者：孙旭东[1] 曾敏峰[2] 鲁越青[2] 姚献东[2] 王芸[2] 肖慧泉[2] 阎逢元[1] 齐陈泽[2] 

机构地区：[1]中国科学院兰州化学物理研究所 [2]绍兴文理学院应用化学研究所,绍兴312000

出　　处：《核技术》2007年第9期735-738,共4页Nuclear Techniques

基　　金：浙江省教育厅项目(20061156);浙江省教育厅青年教师基金资助;绍兴市有机化学重点学科资助

摘　　要：采用气流磨粉碎的方法制备了平均粒径在微米尺寸的三角蚌贝壳粉,将此贝壳粉与环氧树脂进行熔融共混得到一系列不同配比的复合材料。贝壳粉的有机质有助于提高两相间的相互作用,适量微米级贝壳粉的引入,在环氧基体和粒子相之间形成了一定数量的界面层,两相间有较强的界面亲和力,体系的自由体积尺寸与强度略有下降,中间寿命分量强度升高,这种较好的界面效应使得复合材料在受到外力作用时,断裂能和应力能够很好地通过界面传递到贝壳粒子上,从而使复合材料的性能提高。Shell particles in micrometer level have been prepared by a jet milling, and it was used as filler to modify the properties of epoxy resin （EP） by melting-blending. The organic phase of the shell particles was much helpful to improve the interfacial intension. When appropriate content of shell particles were added to EP matrix, the free volume size and its intensity of the composites decreased, but the intensity of the second lifetime 12 increased. It was attributed to the formation of the interfacial layers between the shell particles and EP matrix. This good interfacial property was necessary for efficient stress transfer between the particles and EP matrix. Therefore, the mechanical properties of the composites were approved remarkably.

关 键 词：环氧树脂 自由体积 正电子湮没 增韧 

分 类 号：O631.11[理学—高分子化学] TQ323.5[理学—化学]