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The turbidimetric titration method, used previously to determine molecular weight distributions in polymers, has been used for the qualitative examination of various polymers: mixtures containing block copolymer (styrene‐methyl methacrylate or vinyl acetate‐methyl methacrylate), polystyrenes prepared in branching studies, and commercially prepared polystyrenes. The method is a sensitive and rapid one and is suitable for the examination of very small quantities of polymer. A semiautomatic titration apparatus is also described.
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Melville et al. (1955) studied this question.
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