Comparative gel permeation chromatography calibration techniques in oxidative coupling polymerization

Abstract

SynopsisGel permeation chromatography was utilized in measuring the kinetics of the oxidative coupling polymerization of 2,bdimethylphenol. The elution c,urves at the early stages of reaction were analyzed by two methods of calibration, specifically by qomparison to the elution times of oligomers up to the bmer level, and by the classical counts method. The two methods give similar results, both indicating a polymerization pattern of the general condensation type and increasing dispersity of molecular weight with degree of polymerization.