| 초록 |
Supramolecular polyurethane/urea that owes their mechanical properties primarily to the reversible, non-covalent interactions such as hydrogen bonding interactions. There are many strong non-covalent interactions between the supramolecular polyurethane/urea segments. The multiple hydrogen bonding of urethane/urea groups form particularly strong physical cross-link, viz., thermoreversible rubbers. This study presents the effect of hydrogen bonds on heat absorption self-healing behaviors of this type of supramolecular materials. Tensile strength, glass transition temperature and thermal stability of the polyurethane/urea significantly increased by Mn of the supramolecular chain due to Flory-fox equation and chain entanglement. Furthermore, the self-healing efficiency of the films increased by the Mn of the oligomer chain due to chain diffusion and multiple hydrogen bonds. |
