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Fluorinated polyurethanes with a glass transition temperature as low as´139˝C and a decomposition onset temperature of 247-330˝C were prepared by a reaction of fluorinated alcohols with aromatic and cycloaliphatic diisocyanates in solution or melt.

Peculiarities of Cyclotrimerization of Perfluoroalkyl-and Perfluorooxaalkylacetylenes.-The cyclotrimerization of perfluoroalkylacetylenes is studied under various reaction conditions as a facile route to tris(perfluoroalkyl) benzenes. A plausible mechanistic path is proposed. -(BATIZAT, D. V.; GLAZKOV, A. A.; IGNATENKO, A. V.; YAROSH, A. A.; PONOMARENKO, V. A.; Izv.

Polyamides based on the 5-hydroxymethylfurfural derivative (2,5-furandicarboxylic acid dichloroanhydride) and diamines of both aromatic and aliphatic series were synthesized. The reactions were monitored by 1 H NMR and IR spectroscopy. The thermal stability, glass transition temperature, and intrinsic viscosity of the synthesized polymers were determined.