▎ 摘　　要

At the present study, two types of graphene oxide nanosheets, including reduced graphene oxide (RGO) and reduced functionalized graphene oxide (R(GO-PCL)), were synthesized to investigate the effect of graphene nanosheets functionalization on physical, mechanical, and shape memory properties of PU-Reduced Graphene Oxide nanocomposites. Two types of nanocomposites containing 1 phr RGO and R(GO-PCL) nanosheets were prepared. Fourier transform infrared (FTIR) method confirmed the chemical grafting of PCL to GO by the esterification reaction. Thermal gravimetric analysis (TGA) results exhibited that GO nanosheets were functionalized by roughly 10 wt% of PCL-diols. According to X-ray diffraction (XRD) patterns, the gap of nanosheets in R(GO-PCL) has increased. It could be deduced from XRD and DSC results that nanocomposites crystalline structure has changed compared to neat PU. Field emission scanning electron microscopy (FE-SEM) images confirmed the proper dispersion of R(GO-PCL) nanosheets. Tensile results indicated that the modulus and strain at break of the functionalized nanocomposites were increased.