Experimental Investigation of Casting Shape Memory Polyurethane

摘要

It is feasible to polymerize SMPU from MDI, PBA, BDO and DMF. Each component has a good ductility, but there are insufficient in terms of strength, glass-point temperature, crack resistance and implosion tendencies. The formulation (PBA: BDO: MDI: DMF=1: 3: (3-4): (7-8)) is recommended. SMPU polymerized by this proportion has good comprehensive properties. The effect of the two-step prepolymerization method, especially the full polymerization method is satisfactory. The composite Materials obtained from powders and particles by hot press molding and that formed by cotton fabric have good ductility. Finally, some suggestions are proposed about implosion preventing, casting crack preventing and development technology.