Linear Viscoelasticity of Disordered Polystyrene−Polyisoprene Block Copolymer Based Layered-Silicate Nanocomposites

摘要: The melt-state linear viscoelastic properties for a series of intercalated nanocomposites are examined. based on short disordered polystyrene−polyisoprene diblock copolymer and varying amounts dimethyldioctadecylammonium modified montmorillonite. dynamic oscillatory moduli the stress relaxation in quantitative agreement suggest that at times is essentially unaffected by presence layered-silicate. However, long (or equivalently low frequency), hybrids exhibit dramatically altered behavior. Hybrids with silicate loadings excess 6.7 wt % pseudo-solidlike behavior, similar to observed previous studies exfoliated end-tethered nanocomposites. On basis simple phenomenological arguments, time behavior attributed anisotropic stacks sheets randomly oriented forming percolated network structure i...