| 초록 |
Polyurethane (PU) elastomer is one of versatile polymers for automotive parts, medical applications, and sports goods as the physical properties of PU can be varied in a wide range of hardness and mechanical properties. The hard segments in the polyurethane elastomers act as physical crosslinks as well as reinforcing fillers. The properties of segmented polyurethanes largely depend on the structure of the hard segments. Graphene is attracting attention of scientists as a functional filler due to the excellent mechanical and electrical properties. In this paper, we investigated the effect of the hard segment length on the mechanical and thermal properties in the polyurethane elastomers filled with graphene oxides. It was found that tensile strength of the polyurethane elastomers showed maximum with increasing the hard segment lengths. It is speculated that there is an optimum hard segment length for the efficient reinforcement of polyurethane elastomers filled with graphene oxide. |
