Interpretation of the Gel Permeation Chromatography Behaviour of Three Types of Copolymers

The chromatographic elution of a series of random, block and graft PVC copolymers (with styrene, butadiene, methylmethacrylate, vinylacetate, vinylidene chloride in a large range of composition) is studied. With the help of three consecutive detectors, the composition, molecular weight and intrinsic viscosity of these products are determined and related to the conditions of the synthesis. Results are compared to those obtained by direct measurements. The elution is different for each type of copolymer, varying with the composition but some viscosity-molecular weight relations have been obtained.