The polysilanes containing chlorine were synthesized by three ways: ①Through hydrosilylation reaction the propylene chloride was added to polysilanes containing Si-H.

By using three broad distribution standards of polytitanocarbosilane whose number average molecular weights are determined by VPO, the calibration equation of gel permeation chromatography (GPC) of the preceramic polymer polytitanocarbosilane (PTC) which generally haslow average molecular weight and high branching degree was established as follows: ln M=20 9-0 843T.

The ternary copolymer emulsion of hydrogen containing siloxane (PHMS)/vinylacetate(VAc)/N hydroxymethylacrylamide(NMA)was prepared by emulsion copolymerzation.

Study on preparation and properties of polymeric ferric silicate-chloride containing boron flocculant;