Abstract
A modified internal standard method has been developed to determine the compositions of terpolymers of maleic anhydride with styrene and a methacrylate or an acrylate. The method involves i.r. spectrophotometry of the samples. Infrared spectra are recorded by means of KBr technique. The i.r. analysis is based on integrated absorptivities of the anhydride and ester carbonyl.
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