POLYHYDROXYETHER POLYDIMETHYLSILOXANE GRAFT-COPOLYMERS .1. SYNTHESIS AND CHARACTERIZATION

Graft copolymers of a bisphenol-A-based polyhydroxyether (phenoxy) and polydimethylsiloxane (PDMS) were prepared by (1) the reaction of phenoxy and chlorosilyl-terminated PDMS, and (2) the heterogeneous Pt-catalysed hydrosilation of allyl-derivatized phenoxy with hydrosilyl-terminated PDMS. The monofunctional PDMS oligomers were prepared by the anionic polymerization of hexamcthylcyclotrisiloxane (D3) using n-BuLi as initiator and chlorodimethylsilane (CDMS) or dichlorodimethylsilane (DCDMS) as terminating agent. The copolymers were characterized by H-1 and C-13 n.m.r. spectroscopy, gel permeation chromatography (g.p.c.), t.g.a., d.s.c., and i.r. spectroscopy.