Ha, Yu-mi Kim, Young-O Ahn, Seokhoon Lee, Seoung-ki Lee, Jae-suk Park, Min Chung, Jae Woo Jung, Yong Chae 2024-01-19T19:31:01Z 2024-01-19T19:31:01Z 2021-09-04 2019-09 0014-3057 https://pubs.kist.re.kr/handle/201004/119649 The self-healing polyurethane films have received significant attention due to their unique shape memory behaviors and the hydrogen bonding arising from the urethane linkages. However, it is still a challenge to develop self-healing polyurethane with transparent, high impact resistance, and excellent shape recovery and mechanical properties. In particular, polycarbonate-based polyurethane shows transparency, weatherability and excellent mechanical properties. In this work, transparent self-healing polyurethane film with robust mechanical properties (breaking stress of 26 MPa and elongation at break of 630%) was synthesized by controlling the different molecular weight of the polycarbonate diol and incorporating dynamic disulfide bonds for reversibility. As a result, the self-healing polyurethane film showed an excellent self-healing ability with 98% healing efficiency and excellent shape memory ability with a recovery efficiency of >92%. In addition, we have identified a potential application for the self-healing flexible substrate in flexible electronics because of their stable electrical resistance even upon mechanical deformation. English PERGAMON-ELSEVIER SCIENCE LTD POLYMER ELASTOMERS COORDINATION FABRICATION TRANSISTORS COMPOSITES DESIGN Robust and stretchable self-healing polyurethane based on polycarbonate diol with different soft-segment molecular weight for flexible devices Article 10.1016/j.eurpolymj.2019.05.031 1 EUROPEAN POLYMER JOURNAL, v.118, pp.36 - 44 EUROPEAN POLYMER JOURNAL 118 36 44 scie scopus 000483908500005 2-s2.0-85066281473 Polymer Science Polymer Science Article POLYMER ELASTOMERS COORDINATION FABRICATION TRANSISTORS COMPOSITES DESIGN Self-healing Shape-memory Polyurethane Stretchable flexible substrate