Abstract: Polyurethane elastomer was synthesized with diphenylmethane diisocyanate and poly εcaprolactone glycol/PEPA using 2hydroxypropyl (2hydroxyethyl) carbamate (HPHEC) or 1, 4butanediol as a chain extender, The product was characterized using differential scanning calorimeter(DSC), dynamic mechanical analyzer(DMA), electronic universal testing machine, and rubber resilience tester. It showed that gel time of polyurethane elastomer based on HPHEC was 3 times that of based on 1, 4butanediol. Tear strength of polyurethane elastomer based on HPHEC increased 10 %~ 25 %, and the glass transition temperature (Tg) and dynamic loss tangent (tanδ) also increased.

Key words: polyurethane elastomer, 2-hydroxypropyl (2-hydroxyethyl)carbamate, property