| 초록 |
A self-healable and weatherable polymeric material based on supramolecular networks is synthesized and its properties are characterized. The polymeric materials in this study are prepared from polyimides, where charge transfer complex (CTC) is formed through electronically-complementary interaction between polyimide chains. 3,3',4,4'-Biphenyltetracarboxylic dianhydride (BPDA) is introduced to polyimides to control the degree of CTC and UV-resistance of polyimides. The self-healing efficiency increases with higher molar ratio of BPDA owing to strong CTC interaction induced by BPDA moieties. Interestingly, as the molar ratio of BPDA increases, ΔYI (change in yellow index after UV exposure) decreases considerably while the total transmittance maintains without significant change. The versatile polymeric materials prepared in this study show excellent self-healing capability and weather-proof ability, which can be utilized as effective self-healing materials for outdoor applications. |
