Author/Authors :
Zhang، نويسنده , , Yimin and Li، نويسنده , , W. and Tang، نويسنده , , B. and Ge، نويسنده , , S. and Hu، نويسنده , , X. and Rafailovich، نويسنده , , M.H and Sokolov، نويسنده , , J.C. and Gersappe، نويسنده , , D. and Peiffer، نويسنده , , D.G. and Li، نويسنده , , Z. and Dias، نويسنده , , A.J. and McElrath، نويسنده , , K.O. and Lin، نويسنده , , M.Y. and Satija، نويسنده , , S.K. and Urquhart، نويسنده , , S.G. and Ade، نويسنده , , H.، نويسنده ,
Abstract :
The interfacial properties of a homopolymer (polybutadiene (PB)) and a terpolymer (brominated poly(isobutylene-co-p-methylstyrene) (BIMS)) are reported. Neutron reflectivity was used to study the interfacial structure. The results were complemented by scanning transmission X-ray microscopy and atomic force microscopy, which were used to probe the morphology of these binary blends. Our results show that the interfacial behavior of these elastomeric blends is a direct function of the BIMS chemical composition. The interfacial width decreased with increasing bromide functionality. At levels below 8 mol%, the para-methylstyrene concentration had a less pronounced effect on the compatibility and interfacial characteristics. We also studied the effect of styrene butadiene random copolymers on the miscibility of the PB/BIMS blends. The results showed that styrene-butadiene rubber (SBR) was not fully miscible with BIMS and PB on an individual basis, but addition of relatively small amount of SBR enhances the compatibilization of the PB/BIMS interface. Self-consistent field (SCF) modeling was used to determine the optimum copolymer composition. The calculations are consistent with the experimental results.
