Research and Development of the Preparation Method of Thermally Stable Polymer "MSP".

A new highly heat-resistant polymer containing silicon, poly [(phenylsilylene) ethynylene-1, 3-phenyleneethynylene] (MSP), was prepared by dehydrogenative coupling polymerization between phenylsilane and 1, 3-diethynylbenzene in the presence of magnesia and other base catalysts. The research and development of preparation process of MSP are described, and the preparation flow chart in a bench test using a magnesia catalyst are shown. The properties and some applications of MSP are also reported.