Polyurethanes with Pendant Hydroxyl Groups: Synthesis and Characterization

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. As the number of methylene groups increases between the urethane groups, the glass transition temperature of the polymer decreases. magnified image As the number of methylene groups increases between the urethane groups, the glass transition temperature of the polymer decreases.