SYNTHESIS OF POLYSULFONE BLOCK-COPOLYMERS CONTAINING POLYDIMETHYLSILOXANE

The synthesis of polysulfone-polydimethylsiloxane (PSU-PDMS) linear bl ock copolymers has been carried out in solution by condensation of chl oro-terminated bisphenol A, diphenylsulfone and alpha, omega-di (hydro gensilyl)-polydimethylsiloxane with Si-C bond. H-1-NMR spectra of the block copolymers allow the estimation of siloxane and polysulfone rati o. The molecular weight of the polysulfone and polysiloxane oligomers and the block copolymers was determined by GPC. Thermogravimetric anal ysis indicates a thermal stability of block copolymers up to 400 degre es C and allows estimation of the process activation energy. Microphas e separation of the block copolymers was observed by differential scan ning calorimetry (DSC).