SYNTHESES AND CHARACTERIZATI0N OF Si-CONTAINING POLYESTER-POLYETHER MULTIBLOCK COPOLYMERS

A series of Si-containing polyester-polyether multiblock copolymers were synthesizedby transesterification and melt copolycondensation of organosilicon monomers [1, 1, 3, 3-tetramethyl-1, 3-bis （p-carbomethoxyphenyl） disiloxane] （I ） or dimethyl bis （p-carbometh-oxyphenyl） silane] （II） and dimethyl terephthalate （DMT）, with 1, 4-butanediol, poly-tetramethylene glycol （PTMG） respectively. The organosilicon monomers were preparedby Grinard reaction, oxidation and esterification. The structures of the above monomers（I）, （II） and the copolymers were characterized by MS anal. and;H-NMR.