| 초록 |
Thermoplastic polyurethane (TPU) series based on poly(tetramethylene glycol) (PTMG) as a polyol and Methylene diphenyl diisocyanate (MDI) as a isocyanate were synthesized as a function of molecular weight formulation. Graphene oxide (GO) sheets were chemically grafted with allophanate-functionalized TPUs. Mechanical properties and thermal properties of TPU/Graphene oxide (TPU-g-GO) nanocomposites were systematically evaluated. Tensile strength of individual TPU-g-GO were effectively enhanced from 1.54 to 3.69 MPa, by the addition of stoichiometric GO based on TPU with different MW. TPU-g-GO nanocomposites exhibited Tgs and Tms values in the range of -69.39 to -54.05℃ and 12.63 to 13.59℃, respectively, with increasing of GO content in their formulations and enhancing TPU MW. TPU-g-GO films will be attractive for greatly potential possibility of high-performance films for electrical and electrochemical applications. |
