| 초록 |
A series of shape memory polyurethane (SMPU) were synthesized from poly(propylene glycol)(PPG) and 4,4-methylenebis(phenyl isocyanate) (MDI) with the addition of graphene oxide which was chemically modified with allyl isocyanate and reduced by hydrazine after mixing with polyurethane. The effects of allyl modified graphene (iG) particle on electroactive shape recovery behaviors as well as the conventional direct heat actuated SMPU material have been studied in terms of mechanical, dynamic mechanical, electrical, thermal properties and thermomechanical cyclic behaviors. It was found that Joule heat which is generated by electrical dissipation of iG could induce shape recover of SMPU. |
