Linear and Star-Shaped POSS Hybrid Materials Containing Crystalline Isotactic Polystyrene Chains
Linear and Star-Shaped POSS Hybrid Materials Containing Crystalline Isotactic Polystyrene Chains
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DOI：
10.1002/pola.26458
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发表时间：
2013-02
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影响因子：
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通讯作者：
M. Vielhauer;P. Lutz;G. Reiter;R. Mülhaupt
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文献类型：
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作者：
M. Vielhauer;P. Lutz;G. Reiter;R. Mülhaupt
采用硅氧烷氢偶联的方法，将端乙烯基的聚苯乙烯（iPS）与八甲基（二甲基硅氧基）硅氧烷（Q8M8H）偶联，制备了新型纳米结构等规聚苯乙烯（iPS）无机-有机杂化材料。iPS链的平均摩尔质量在2000 ~ 6000 g mol−1之间。作为iPS/Q8M8H比的函数，使用过量的试剂，可以形成线性或星形的混合结构。通过分馏，可以分离出含有一个iPS链和七个乙基的明确的线性杂化物（iPS- q8m8e7），以及含有多达八个iPS侧链的星形杂化物（iPS6-8-Q8M8）。当iPS侧链的平均摩尔质量超过5500 g mol−1时，这些新型iPS/多面体低聚硅氧烷杂化材料结晶。通过核磁共振光谱、凝胶渗透色谱和偏振光显微镜对硅氢化偶联反应及得到的线性iPS-Q8M8E7和星形iPS6-8-Q8M8进行了表征。©2012 Wiley期刊公司高分子材料学报，2013
New crystalline nanostructured inorganic–organic hybrid materials containing isotactic polystyrene (iPS) are prepared by means of hydrosilylation coupling of vinyl-terminated iPS with octakis(dimethylsilyloxy)silsesquioxane (Q8M8H). The number average molar mass of the iPS chains varies between 2000 and 6000 g mol−1. As a function of the iPS/Q8M8H ratio, using excess reagent, the formation of linear or star-shaped hybrid architectures is achieved. Via fractionation, it is possible to isolate well-defined linear hybrids containing one iPS chain and seven ethyl groups per silica core (iPS-Q8M8E7) as well as star-shaped hybrids containing up to eight iPS side chains (iPS6-8-Q8M8). These new iPS/polyhedral oligomeric silsesquioxane hybrid materials crystallize when the number average molar mass of iPS side chain exceeds 5500 g mol−1. The hydrosilylation coupling reaction and the resulting linear iPS-Q8M8E7 and star-shaped iPS6-8-Q8M8 are characterized by NMR spectroscopy, size exclusion chromatography (gel permeation chromatography), and polarized light microscopy. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013