Synthesis of polybutadiene-graft-poly(dimethylsiloxane) and polyethylene-graft-poly(dimethylsiloxane) copolymers with hydrosilylation reactions

We report preliminary results for the synthesis of polyethylene‐graft‐poly(dimethylsiloxane) copolymers obtained by catalytic hydrogenation of polybutadiene‐graft‐poly(dimethylsiloxane) copolymers (PB‐g‐PDMS). These last copolymers were synthesized by hydrosilylation reactions between commercial polybutadiene and ω‐silane poly(dimethylsiloxane). The reaction was carried in solution catalyzed by cis‐dichloro bis(diethylsufide) platinum(II) salt. The PB‐g‐PDMS copolymers were analyzed by 1H and 13C NMR spectroscopies, and the relative weight percentages of the grafted poly(dimethylsiloxane) macromonomer were determined from the integrated peak areas of the spectra. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2920–2930, 2004 Polybutadiene‐graft‐poly(dimethylsiloxane) copolymers were synthesized by hydrosilylation reactions between commercial polybutadiene and ω‐silane poly(dimethylsiloxane) catalyzed by cis‐dichloro bis(diethylsufide) platinum(II) salt. By subsequent hydrogenation of these copolymers, polyethylene‐graft‐poly(dimethylsiloxane) copolymers were obtained. The chemical compositions of these copolymers were determined by 1H and 13C NMR spectroscopies.