A. A. Popova, E. A. Litmanovich, E. N. Golubeva, A. V. Plutalova, E. M. Budynina, E. V. Chernikova
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Synthesis of Poly(N-isopropylacrylamide) in Supercritical Carbon Dioxide and Properties of Aqueous Solutions of the Obtained Polymers
Poly(N-isopropylacrylamide) has been synthesized for the first time by reversible addition-fragmentation chain transfer polymerization in supercritical carbon dioxide. It has been shown that the molecular weight distribution of the polymer is narrower and its average molecular weights are lower than those of poly(N-isopropylacrylamide) synthesized in supercritical СО2 (scСО2) according to the conventional radical mechanism. Both polymers are branched and contain a minor proportion of the gel fraction. The form factors determined by light scattering are 1.35 (conventional polymerization) and 1.11 (reversible addition-fragmentation chain transfer polymerization), which is typical for branched and hyperbranched polymers, respectively. Aqueous solutions of the polymers are thermoresponsive and characterized by a cloud point of 30–31°С.
期刊介绍：
Polymer Science, Series B is a journal published in collaboration with the Russian Academy of Sciences. Series B experimental and theoretical papers and reviews dealing with the synthesis, kinetics, catalysis, and chemical transformations of macromolecules, supramolecular structures, and polymer matrix-based composites (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed
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