On the colligative nature of the specific refractive increment for statistical copolymers

Abstract

Abstract The specific refractive increment for statistical copolymers is shown to be colligative in nature for copolymers of styrene–methyl methacrylate thus giving direct evidence to support the assumption of Stockmayer et al. on the theory for light scattering in copolymers. The determination of the mole fraction of mer composition in copolymers by specific refractive increment measurements is shown to be a useful technique and nearly as precise as chemical analysis for carbon. The technique is restricted to soluble systems and is limited by the resolution of the measuring instrument.