Miscibility behavior of syndiotactic and atactic polystyrene

Abstract

Abstract Blends of atactic and syndiotactic polystyrene have a single composition dependent glass transition temperature. This does not confirm the miscibility of both polymers, however, unambiguously because there is only a small difference of 10°C in the glass transition temperatures of both neat polymers. Diffusion measurements of syndiotactic polystyrene and deuterated atactic polystyrene using the nuclear reaction D( 3 He,α)p confirm at least partial miscibility of both components. The average diffusion coefficient at 190°C is 2.3 ± 0.2 × 10 −15 cm 2 /s.