▎ 摘　　要

Novel poly(ether-imide)/polyurethane (PEI/PU)-based nanocomposite and foamed systems reinforced with graphene nanoplatelet (GNP) were developed. Field emission scanning electron microscopy revealed hexagonal nanocelluar morphology due to fine interaction between PEI/PU and functional GNP. Compression strength and modulus values were raised up to 72.3MPa and 27.3GPa, respectively, for PEI/PU/GNP Foam 1, thus revealing a defensive role of GNP layer against damage. T-max of PEI/PU/GNP Foam 0.1-1 was measured as 479-565 degrees C. The UL 94 showed V-0 rating for nanocomposite, while foams attained V-1 rating. Water absorption capacity was improved steadily with time and was at maximum after 96h for PEI/PU/GNP Foam 1 (12.3%).