Development of Methods for Determining Molecular Weights of Epoxy Resin

Abstract

Molecular weight, as one of the characteristic indexes of the intrinsic structure of epoxy resin, has a decisive impact on the curing process of epoxy resin, the structure of cured products and even the properties of composites. It is an important indicator for the quality evaluation of epoxy resin. This paper introduces various instrumental analysis techniques for molecular weight testing, including gel permeation chromatography, nuclear magnetic resonance spectroscopy, vapor pressure osmometry and mass spectrometry, and also compares and reviews the principles, characteristics, applications, and problems of each method, and finally looks into the research prospects.