Pore-size distribution controls shape-memory properties on the macro- and microscale of polymeric foams
- Open porous foams with identical foam density but different pore-size distributions (bimodal or monomodal) are prepared from a shape-memory polyetherurethane (PEU) by thermally induced phase separation. The shape-memory effect of the two PEU foams is explored by cyclic thermomechanical compression tests and microstructural analysis. The obtained results reveal that the PEU foam with a bimodal pore-size distribution exhibits an increased shape-recovery under stress-free conditions, both on the macro- (foam level) as well as the microscale (pore level). While bimodal pore-size distributions induce microscale bending during compression, buckling occurs in foams with monomodal pore-size distributions, leading to both a reduced and delayed shape recovery.
Author details: | Tilman SauterGND, Karl KratzORCiD, Andreas LendleinORCiDGND |
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DOI: | https://doi.org/10.1002/macp.201300062 |
ISSN: | 1022-1352 |
Title of parent work (English): | Macromolecular chemistry and physics |
Publisher: | Wiley-VCH |
Place of publishing: | Weinheim |
Publication type: | Article |
Language: | English |
Year of first publication: | 2013 |
Publication year: | 2013 |
Release date: | 2017/03/26 |
Tag: | microstructure; morphology; polymer foams; pore-size distribution; shape-memory polymers |
Volume: | 214 |
Issue: | 11 |
Number of pages: | 5 |
First page: | 1184 |
Last Page: | 1188 |
Funding institution: | Berlin-Brandenburg School for Regenerative Therapies [DFG-GSC 203] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
Peer review: | Referiert |