Interfacial molecular dynamics of styrenic block copolymer-based nanocomposites with controlled spatial distribution

摘要: Abstract The dielectric properties of nanocomposites polystyrene-b-poly (ethylene-co-butylene)-b-polystyrene (SEBS) triblock copolymers containing organically modified clay nanoparticles featuring controlled spatial orientation at the nanoscale: isotropic, totally oriented and partially oriented, have been investigated correlated with nanocomposite morphologies. A slow relaxation process attributed to elastomer chains reduced mobility confined nanoparticle/polymer interphase was observed in all found be dependent on nanoclay polystyrene (PS) domains, location tactoids as well PS block fraction. “interfacial” glass transition temperature Tgi assigned this characteristic estimated occur temperatures ranging between 6 °C 35 °C depending nanocomposite, which is much higher than bulk rubber phase temperature, normally lower than −40 °C for studied copolymers. Interestingly, highest were associated random or partial and/or selective phase.