POLY (VINYLMETHYLSILANE) AND POLY(VINYLDIMETHYLSILANE) - SYNTHESIS AND CHARACTERIZATION - REACTION OF THE LATTER WITH PHENYLACETYLENE

The Co-60 gamma-radiation-induced polymerization of CH2=CHSiMeCl(2) an d CH2=CHSiMe(2)Cl has been studied. The resulting poly(vinylmethyldich lorosilane) and poly(vinyldimethylchlorosilane) were reduced with LiAl H4 to the respective polymeric silicon hydrides, PVSiMeH(2) and PVSiMe (2)H, which were characterized by IR and H-1, C-13 and Si-29 NMR spect roscopy and by GPC molecular weight determinations. A structure contai ning [CH2CH(SiR(3))] and [CH2CH(SiR(3))-CH(SiR(3))CH2] repeat units an d CH2=C(SiR(3)) end groups (R(3)Si=(CH3)H2Si and (CH3)(2)HSi) was dedu ced. The chloroplatinic acid-catalyzed addition of oligomeric PVSiMe(2 )H to phenylacetylene gave an oligomer containing trans-PhCH=CHSiMe(2) - and CH2=C(Ph)SiMe(2)- side chains.