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Radical polymerization of water-soluble monomers in various solvents

✍ Scribed by V.F. Gromov; Yu.S. Bogachev; Ye.V. Bune; I.L. Zhuravleva; E.N. Teleshov

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
294 KB
Volume
27
Category
Article
ISSN
0014-3057

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✦ Synopsis

The NMR-spectra of acrylamide and polyacrylamide in various mixtures of water with DMSO have been studied as well as of N-vinylpyrrolidone and its polymer in various solvents. The results indicate that, while the carbonyl groups of acrylamide and N-vinylpyrrolidone in aqueous solution are practically completely bonded with water molecules, in the case of the corresponding polymers only some of the carbonyl groups take part in the formation of H-bonds because of the hydrophobic interactions arising in aqueous solutions of these polymers. These results make it possible to propose a mechanism for the solvent effects in the radical polymerization of water-soluble monomers.

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## Abstract In this work, we have calculated the thermodynamic parameters of the first steps of the free radical and anionic polymerizations of various unsaturated monomers, using ab initio methods of quantum chemistry. The enthalpies and entropies of polymerization were estimated assuming that the