Abstract
Gel-permeation chromatography and fractionation by distribution between two liquid phases were used to invdstigate the molecular weight distributions of four polyarylate samples based on phenolphthalein and terephthalic acid chloride. Gel-permeation chromatography was carried out using a KhZh-1302 device with Styrogel columns packed by methods proposed in this study. It was shown that fractionation gives a lower coefficient of polydispersion than the method of gel-permeation chromatography. Bimodal distribution was obtained for three samples by gel-permeation chromatography. Proposals were put forward concerning possible causes of this molecular weight distribution.
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