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.
| Verfasserangaben: | Tilman SauterGND, Karl KratzORCiD, Andreas LendleinORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1002/macp.201300062 |
| ISSN: | 1022-1352 |
| Titel des übergeordneten Werks (Englisch): | Macromolecular chemistry and physics |
| Verlag: | Wiley-VCH |
| Verlagsort: | Weinheim |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2013 |
| Erscheinungsjahr: | 2013 |
| Datum der Freischaltung: | 26.03.2017 |
| Freies Schlagwort / Tag: | microstructure; morphology; polymer foams; pore-size distribution; shape-memory polymers |
| Band: | 214 |
| Ausgabe: | 11 |
| Seitenanzahl: | 5 |
| Erste Seite: | 1184 |
| Letzte Seite: | 1188 |
| Fördernde Institution: | Berlin-Brandenburg School for Regenerative Therapies [DFG-GSC 203] |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
| Peer Review: | Referiert |
