通过辐射交联提高PLA/纤维复合材料的耐热性能  

Improvement of Heat Stability of PLA/Fiber Composite by Radiation Induced Cross-linking

作　　者：邓鹏飏[1] 柳美华[1] 郑晓伟[1] 刘南安[1] 董丽松[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《高等学校化学学报》2009年第12期2530-2533,共4页Chemical Journal of Chinese Universities

基　　金：国家"八六三"计划项目(批准号:2008AA03Z511);长春市科技计划基金(批准号:05GG57)资助

摘　　要：通过热加工的方法制备了一系列含三烯丙基异氰脲酸脂(TAIC)的PLA/纤维复合材料,并在氮气保护下用γ射线诱导发生辐射交联反应.通过热变形温度实验表明辐射交联后,复合材料的热变形温度(HDT)都有提高,特别是当纤维质量分数超过20%时,即使在很小的吸收剂量下,复合材料的HDT从60℃左右大幅提高到120℃以上.HDT的提高只与纤维的含量有关而与纤维种类无关.凝胶抽提与红外光谱实验结果表明,复合材料在辐射后所形成的复杂交联结构,可能是导致其HDT大幅提高的重要原因.A series of PLA/fiber composites containing triallyl isocyanurate（TAIC） were prepared with melt blending. In order to induce radiation crosslinking, composites were irradiated by γ-rays under N2. Experimental results of heat distortion temperature（HDT） demonstrated that the HDT of composites were enhanced after crosslinking. Especially when the mass fraction of fiber exceeded 20%, the HDT of composites increased from 60 ℃ to 120 ℃ even at very low absorbed dose. The improvement of HDT was related with the fiber content instead of the fiber type. The gelation experiment and FTIR results indicated that the complicated crosslinking structure was formed after radiation. And such structure caused the significant improvement of HDT.

关 键 词：聚乳酸 纤维复合材料 辐射交联 耐热性 

分 类 号：O633.14[理学—高分子化学]