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Copolymerization of 2-pyrrolidone and its methyl derivatives. Thermal properties used for determination of the copolymer structure

A. Deratani, F. J Carrière, and H. Sekiguchi

Laboratoire de Chimie Macromoléculaire, École Supéríeure de Physique et de Chimie Industrielles de Paris, 752 31 Paris Cedex 05

 

Abstract:   Copolymers of 2-pyrrolidone and its C-methyl derivatives were prepared with anionic catalysts. A methyl substituent on the pyrrolidone ring notably decreased polymerizability more or less according to its position. The incorporation of the methyl units depended also on the nature of the catalyst cation. Transitions, melting points, and degradation of resulting compounds were studied and the results enabled us to determine the copolymer structure. The data of thermal properties indicate that the nature of catalyst cation plays an important part in obtaining true random copolymers: this is confirmed by study of the incorporation ratio.

Full paper in Portable Document Format: 303a292.pdf

 

Chemical Papers 30 (3) 292–300 (1976)

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