SYNOPSISThe radical polymerization of isoprene in alcohol solutions initiated by hydrogen peroxide was studied. It was found that alcohols were components of the initiated system and that their fragments with hydroxyl groups were included in every second molecule of an oligomer irrespective of the type of alcohol, of the monomer conversion, and of the oligomer molecular weight. The oligomer yields and its molecular weight were determined by alcohols through their effect upon the phase state of polymerization systems.

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The regular trends in chemical degradation of rigid polyurethane foam under the action of oxypropylated hydroxy compounds were studied. The molecular-weight characteristics, functionality with respect to 4,4`-diphenylmethane diisocyanate and OH groups, viscosity, and the content of terminal OH groups of alcoholysis products at temperatures from 150 to 220oC were determined. A mechanism of degradation of the network structure of rigid polyurethane foam was suggested.