Macromolecular Research, Vol.27, No.7, 649-656, July, 2019
Self-Healing Polycarbonate-Based Polyurethane with Shape Memory Behavior
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A self-healing polycarbonate-based shape memory polyurethane (PCPU) comprising of polycarbonate diol, 4,4′-diphenylmethane diisocyanate (MDI) and 1,4-Butanediol (1,4-BDO) was synthesized. Through a series of shape memory tests, PCPUs showed 100% shape fixation rate, and a shape recovery rate of over 95% within 15 s. PCPUs exhibit excellent mechanical properties compared to common shape memory polymers, such as a tensile strength of up to 38.10 MPa and elongation at break of 616%. Additionally, after being damaged, polyurethane can self-heal within 60 s at 80 °C without any external force, which makes it applicable in many fields.
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