Nanocomposites of a Silicon-containing Arylacetylene Resin with Octakis（dimethylsiloxy）octasilsesquoixane

周燕¹，BU Xiaojun¹，黄发荣¹，DU Lei¹，LIANG Guozheng²

1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology (East China University of Science and Technology),Ministry of Education, East China University of Science and Technology2. Department of Materials Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University

摘 要：Nanocomposites（PMSEPE/Q₈M₈^H） were prepared via solution blending of octakis（dimethylsiloxy）octasilsesquoixane（Q₈M₈^H） into poly（dimethylsilyleneethynylenephenyleneethynyle ne）（PMSEPE）. PMSEPE/Q₈M₈^H nanocomposites were characterized by Fourier transform infrared（FT-IR） spectroscopy, rheological measurement, differential scanning calorimetry（DSC）, scanning electron microscopy（SEM） and thermal gravimetric analysis（TGA）. The experimental results show that the hydrosilylation reaction in PMSEPE/Q₈M₈^H nanocomposites occurs slowly exceeding 180 ℃. PMSEPE/Q₈M₈^H nanocomposites can be cured at temperatures less than 260 ℃ and the cube structure of Q₈M₈^H keeps stable during the curing process. POSS domains are evenly dispersed in the cured nanocomposite. However, serious aggregation of POSS occurs at 15% Q₈M₈^H content. The thermal and thermooxidative stabilities of PMSEPE/Q₈M₈^H nanocomposites obviously depend on the content of Q₈M₈^H. The incorporation of Q₈M₈^H can effectively enhance the thermal and thermooxidative stabilities of cured PMSEPE. PMSEPE/Q₈M₈^H nanocomposites can be the candidates for applications in high temperature environment.

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