Abstract: Casting twocomponent polyurethane elastomers were synthesized with polytetramethylene ether glycols (PTMG), 1,5naphthalene diisocyanate (NDI), 1,4butanediol (BDO), and trimethylolpropane (TMP) as the main precusors. The obtained polyurethane elastomers had superior mechanical properties, good flexibility at low temperature, low dynamic heat, and high storage modulus. With increasing NCO content, the platform modulus and hardness increased, the glass transition temperature of soft segments and the loss factor reduced, while tensile strength first increased and then decreased.

Key words: 1, 5naphthalene diisocyanate, polyurethane elastomer, thermal property, mechanical property