This artical reviews the work three-step on the synthesis soluable polysilsesquioxanes(PSSQ) with high molecular weight and their copolymer by the equilibration hydrolysis of phenyltrichlorosilane

phenyltrialkoxysilane

methyltrichlorosilane

methyltrichlorosilane and methyltriacetoxysilance respectively with alkal-i catalyzed reaction. One-step synthesis of thermoplastic phenylsilsesquioxane polymer with phenyltrichlorosilance as the started materials is introduced.The synthesis of insoluable PSSQ with cube structure with three kinds of organic functional radicals as materials

by alkal-i catalyzed

equilibration method is concluded.At last

metal halide catalyzed nonhytrolytic so-l gel route to organosilsesquioxanes gel are defined.These should be helpful to the synthesis of different PSSQ with different structure.