聚苯乙烯/多面体倍半硅氧烷(POSS)纳米复合材料

Polystyrene/Polyhedral Oligomeric Silsesquioxane(POSS) Nanocomposites

本研究通过Wittig反应合成了同时含有金属和双键的新型磁性多面体齐聚倍半硅氧烷POSS1(Fc-CH=CH-C6H6-(C4H9)7Si8O12,Fc:Ferrocene),并通过FTIR1、H-NMR1、3C-NMR2、9Si-NMR对其化学结构进行了表征。将其加入苯乙烯中通过自由基本体聚合制备了聚苯乙烯/POSS1纳米复合材料。XRD和TEM结果表明,POSS1在纳米材料中含量为1%(wt)和3%(wt)时可达分子级分散,而含量为5%(wt)时部分POSS1以晶体形式存在。热失重分析表明PS/POSS1纳米材料较纯PS热稳定性增加,含5%(wt)POSS1的纳米复合材料起始分解温度比纯PS的约提高了19℃。PS/POSS1纳米材料的玻璃化转变温度较纯PS明显提高。

4-(2-Ferrocenylethenyl)-phenyl-POSS Fc-CH=CH-C_6H_6-(C_4H_9)_7Si_8O_(12)(POSS1),containing metal and C=C double bond,was synthesized by the Wittig reaction.The chemical structure of POSS1 was characterized by FTIR,~1H-,^(13)C-and ^(29)Si-NMR.Novel polystyrene nanocomposites containing POSS1 were prepared by bulk free radical polymerization.The dispersion quality of POSS1 in the matrix of polystyrene was characterized by XRD and TEM.The results indicate that POSS1 is completely dispersed at molecular level i...