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Polyurethanes with Pendant Hydroxyl Groups: Synthesis and Characterization
Authors:Luc Ubaghs  Nicole Fricke  Helmut Keul  Hartwig Hcker
Abstract:Communication: Phenoxycarbonyloxymethyl ethylene carbonate 4 was synthesized from glycerol carbonate and phenyl chloroformate. Polyurethanes with pendant hydroxyl groups were obtained from polycondensation reactions of this AA* monomer with diamines. These polymers contain primary as well as secondary hydroxyl groups. The obtained polyurethanes are amorphous materials. The glass transition temperature decreases with increasing number of methylene groups between the urethane groups.
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As the number of methylene groups increases between the urethane groups, the glass transition temperature of the polymer decreases.

Keywords:NMR  polycondensation of AA* with BB monomers  polyurethanes  thermogravimetric analysis
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