1. Department of Polymer Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, China;2. Centre for Biomaterial Development, Institute of Polymer Research, GKSS Research Centre Geesthacht, Kantstr. 55, 14513 Teltow, Germany;3. Sika Technology AG, Tüffenwies 16, CH‐8048 Zürich, Switzerland
Abstract:
Thermoplastic phase‐segregated multiblock copolymers with polydepsipeptides and PCL segments were prepared via coupling of diol and PCL‐diol using an aliphatic diisocyanate. The obtained multiblock copolymers showed good elastic properties and a shape memory. Almost complete fixation of the mechanical deformation, resulting in quantitative recovery of the permanent shape with a switching temperature around body temperature, was observed. In hydrolytic degradation experiments, a quick decrease of the molecular weight without induction period was observed, and the material changed from elastic to brittle in 21 d. These materials promise a high potential for biomedical applications such as smart implants or medical devices.
