Abstract: The polyurethane elastomers from hydroxy-terminated copolymer of butadiene-acrylenitrile(HTBN) were prepared at different curing temperatures. Toluene diisocyanate was used as curing agent and N,N'-bis(2-hydroxypropyl)aniline as chain extender. The results showed that the curing rate depends on the curing temperature and the high the temperature, the fast the rate. The activation energy of reaction was determined as 39 kJ/mol. The crosslinking density of cured elastomer, therefore, the tensile strength and hardness of the elastomer increase with increase of the curing temperature, and its elongation decreases with increasing curing temperature.

Key words: HTBN, Polyurethane, Cure reaction, Mechanical property