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Shape-memory properties of polyetherurethane foams prepared by thermally induced phase separation

  • In this study, we report the preparation of two structurally different shape-memory polymer foams by thermally induced phase separation (TIPS) from amorphous polyetherurethanes. Foams with either a homogeneous, monomodal, or with a hierarchically structured, bimodal, pore size distribution are obtained by adoption of the cooling protocol. The shape-memory properties have been investigated for both foam structures by cyclic, thermomechanical experiments, while the morphological changes on the micro scale (pore level) have been compared to the macro scale by an in situ micro compression device experiment. The results show that the hierarchically structured foam achieves higher shape-recovery rates and a higher total recovery as compared to the homogeneous foam, which is due to an increased energy storage capability by micro scale bending of the hierarchically structured foam compared to pure compression of the homogeneous foam.

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Author details:Tilman Sauter, Karola Lützow, Michael Schossig, Hans Kosmella, Thomas Weigel, Karl Kratz, Andreas LendleinORCiDGND
Title of parent work (English):Advanced engineering materials
Place of publishing:Weinheim
Publication type:Article
Year of first publication:2012
Completion year:2012
Release date:2017/03/26
Number of pages:7
First page:818
Last Page:824
Funding institution:Berlin-Brandenburg School for Regenerative Therapies [DFG-GSC 203]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie
Peer review:Referiert