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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。
In this study, a novel magnetic polyhedral oligomeric silsesquioxane POSS1 (Fc-CH = CH-C6H6- (C4H9) 7Si8O12, Fc: Ferrocene) containing both metal and double bonds was synthesized by Wittig reaction. Its chemical structure was characterized by NMR1,3C-NMR2,9Si-NMR. Polystyrene / POSS1 nanocomposites were prepared by free radical bulk polymerization when added to styrene. The results of XRD and TEM show that POSS1 can be molecularly dispersed at the content of 1% (wt) and 3% (wt) in nanomaterials, while part of POSS1 exists in the form of crystals at the content of 5% (wt). Thermogravimetric analysis showed that the thermal stability of PS / POSS1 nanocomposites was higher than that of pure PS, and the initial decomposition temperature of nanocomposites containing 5% (wt) POSS1 was increased by about 19 ℃ than pure PS. The glass transition temperature of PS / POSS1 nanomaterials is obviously higher than pure PS.