Details

Autor(en) / Beteiligte

• Ha, Yu-mi
• Kim, Young-O
• Ahn, Seokhoon
• Lee, Seoung-ki
• Lee, Jae-suk
• Park, Min
• Chung, Jae Woo
• Jung, Yong Chae

Titel

Robust and stretchable self-healing polyurethane based on polycarbonate diol with different soft-segment molecular weight for flexible devices

Ist Teil von

• European polymer journal, 2019-09, Vol.118, p.36-44

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• [Display omitted] •We developed a novel self-healing and shape memory polyurethane elastomer with superior mechanical properties by controlling the different molecular weight of the polyol and incorporating dynamic disulfide bonds for reversibility.•We have identified a potential application for the self-healing flexible substrate in flexible electronics. 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.