POLYSULFONE BLOCK COPOLYMERS CONTAINING POLYDIMETHYLSILOXANE. V1SCOMETRIC BEHAVIOR IN SOLUTIONS OF DICHLOROETANE

摘要

Polysulfone block copolymers containing polydimethylsiloxane (PSU-PDMS) samples were obtained in solution by condensation of chloro-terminated bisphenol A diphenylsiufone and α, ω-di(hydrogensilyl)-polydimethylsiloxane with Si-H bond. Viscometric measurements were carried out in dichlorethane over a large domain of concentrations, in the temperature range of 20℃ - 50℃. A discontinuity was observed in the curves, pointing to a transition phenomenon, located near 40℃.