原位聚合制备碳纳米管_PMMA复合材料的研究.pdfVIP

塑料工业 第 32 卷第 2 期 ·20 · CHINA PLASTICS INDUSTRY 2004 年 2 月 原位聚合制备碳纳米管/ PMMA 复合材料的研究　 朱立超 , 张 　志 , 高彦芳 (清华大学化工系高分子研究所 ,北京 100084) 　　摘要 :采用原位聚合的方法 ,制备了多壁碳纳米管/ 聚甲基丙烯酸甲酯复合材料 。多壁碳纳米管经过强酸氧化处理 , 表面具有有机活性 。碳纳米管的加入并未使聚合诱导期延长 ,但令体系粘度增加 , 自加速现象提早出现 。DMA 和 TGA 的研究表明 ,碳纳米管用量少于 10 %的复合物玻璃化温度降低 ,分解温度无显著变化 。加入 10 % 的碳纳米管可以使 PMMA 复合材料冲击强度提高 80 %以上 。断面扫描电镜表明 ,碳纳米管呈单管分散于基体中。 　　关键词 :原位聚合 ;碳纳米管 ;单管分散 ;复合材料 ( ) 　　中图分类号 :TQ343 　　　文献标识码 :B 　　　文章编号 :1005 - 5770 2004 02 - 0020 - 03 Study of Preparation of CNTs/ PMMA Composites by Insitu Polymerization ZHU Lichao , ZHAN G Zhi , GAO Yanfang ( Institute of Polymer Sci Eng , Tsinghua University , Beijing 100084 , China) ( ) Abstract :Carbon nanoscale tubes CNTs / PMMA composites were prepared by insitu polymerization CNTs were first treated by strong acid to exhibit surface organic activity The addition of CNTs did not prolong the induc tion period of the polymerization , but made the viscosity of the system increased , resulted in an earlier selfaccelera tion The heat properties of the composite were studied by DMA and TGA The results showed that when the content of CNTs was less than 10 % , the glassy transition temperature of the composites lower than that of PMMA and the decomposition point had no evidently change ; when the content of CNTs was 10 % , the impact strength of the com posite increased by more than 80 % SEM images displayed t