Property of BAMO-AMMO alternative block thermoplastic elastomer

3, 3'-Bisazidomethyl oxetane-3-azidomethyl-3'-methyl oxetane (BAMO-AMMO) alternative block thermoplastic elastomer was synthesized though solution method using BAMO-AMMO tri-block copolymer as prepolymer, toluene diisocyanate (TDI) and 1, 4-butanediol (BDO) as curing agents. The structure and property were analyzed by GPC, DSC, FT-IR, rheometer and mechanical property test. The results show that azide groups form hydrogen bond with the urethane groups, the mole ratio of hydrogen bonding -NH and free -NH is 3.56:1. The number average molecular weight of BAMO-AMMO alternative block thermoplastic elastomer is 30432; glass transition temperature (T_g) increases with the increasing of w(TDI+BDO). When w(TDI+BDO) is 20%, T_g is -42.14°C, tensile strength reaches 9.21 MPa, elongation at break is 375%; creep recovery time is 200s, the minimum deformation value is 0.1%, which shows BAMO-AMMO alternative block thermoplastic elastomer has an excellent creep resistance and creep recovery capacity.