Neumann Daniel, Fisher Mark, Tran Linh, Matisons Janis G
Ian Wark Research Institute, University of South Australia, Mawson Lakes, South Australia 5095.
J Am Chem Soc. 2002 Nov 27;124(47):13998-9. doi: 10.1021/ja0275921.
Organic-inorganic hybrids are an important class of new materials that offer improved thermal and mechanical properties over normal polymers. They may be produced by either the sol-gel route or through the use of inorganic compounds possessing reactive functional groups. Polyhedral oligosilsesquioxanes (POSS) are completely defined molecules of nanoscale dimensions that may be functionalized with reactive groups suitable for the synthesis of new organic-inorganic hybrids. Here we report the synthesis and characterization of a novel POSS possessing eight isocyanate groups via the hydrosilylation of octakis(hydridodimethylsiloxy)octasilsesquioxane (Q8M8H) and m-isopropenyl-alpha,alpha'-dimethylbenzyl isocyanate (m-TMI). The suitability of this new macromer to the synthesis of a organic-hybrids has been explored by forming a new type of highly cross-linked polyurethane elastomer via reaction of the macromer with poly(ethylene glycol) using dibutyltin dilaurate catalyst.
有机-无机杂化材料是一类重要的新型材料，与普通聚合物相比，它们具有更好的热性能和机械性能。它们可以通过溶胶-凝胶法或使用具有反应性功能基团的无机化合物来制备。多面体低聚倍半硅氧烷（POSS）是完全确定的纳米级分子，可以用适合合成新型有机-无机杂化材料的反应性基团进行功能化。在此，我们报道了通过八（氢二甲基硅氧基）八硅倍半硅氧烷（Q8M8H）与间异丙烯基-α，α'-二甲基苄基异氰酸酯（m-TMI）的硅氢化反应合成并表征了一种具有八个异氰酸酯基团的新型POSS。通过使用二月桂酸二丁基锡催化剂使该大分子单体与聚乙二醇反应形成一种新型的高度交联聚氨酯弹性体，探索了这种新型大分子单体对合成有机杂化材料的适用性。
