Gelation of Micellar Block Polyelectrolytes: Evidence of Glassy Behavior in an Attractive System

摘要: We present small-angle neutron scattering and rheology for micellar solutions of polystyrene−poly(acrylic acid) block copolymers that can be regarded as attractive colloids. These systems form gels at high effective volume fractions (φ > 0.64) are suggestive disordered colloidal glasses. At the gel point, solution follows scaling predicted by classical percolation theory, with G‘ ∼ G‘‘ ωΔ. argue this could due either to formation a percolated network or pretransitional glassy phase.