Evaluation of the light‐scattering technique for determining compositional heterogeneity in copolymers

摘要

AbstractThe Bushuk and Benoit theory of light scattering in copolymer systems has been evaluated for the case of a copolycarbonate of bisphenol A and poly(ethylene oxide) (1000) and for a blend of this compositionally homogeneous copolymer with a homopolymer of bisphenol A polycarbonate. The experimental conditions necessary for a successful light‐scattering analysis and an estimate of the limiting sensitivity of the method are reported. The technique was disappointingly insensitive to the amount of low molecular weight homopolymer incorporated in the blend. This finding, in addition to recent reports in the literature, suggests the method has limited applicabilit