Determination of epoxide and hydroxyl groups in epoxide resins by IR spectrometry

The IR spectra of 40% acetone solutions of epoxy resins with different molecular mass were studied. A correlation was found between the intensities of some absorption bands for the determination of epoxide (920 cm(-1)) and hydroxyl (3450 cm(-1)) groups and for the estimations of the average molecular mass of the resin (1108 cm(-1)).