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Bidirectional actuation of a thermoplastic polyurethane elastomer
- Herein, we report on how to teach a thermoplastic polyurethane elastomer completely stress-free, bidirectional motion. Briefly spoken, we applied training, consisting of extensive tensile deformation in the specimen's viscoelastic state, initiating deformation-induced crystallization. Once unloaded, thermo-reversible specimen expansion and contraction could be detected. Following the microstructural evolution of such a trained specimen by in situ wide-angle X-ray scattering gave evidence for progressive growth of oriented crystallites during cooling. Upon heating, crystallite melting resulted in structural disorder. Beyond this, modification of the training method was used to introduce a geometrically more complex crystalline order. Here, actuation in the form of a decrease and an increase in sample thickness and specimen twisting and untwisting were witnessed. The novel semi-crystalline polymer actuator highlights an enormous potential for realizing versatile reversible shape changesHerein, we report on how to teach a thermoplastic polyurethane elastomer completely stress-free, bidirectional motion. Briefly spoken, we applied training, consisting of extensive tensile deformation in the specimen's viscoelastic state, initiating deformation-induced crystallization. Once unloaded, thermo-reversible specimen expansion and contraction could be detected. Following the microstructural evolution of such a trained specimen by in situ wide-angle X-ray scattering gave evidence for progressive growth of oriented crystallites during cooling. Upon heating, crystallite melting resulted in structural disorder. Beyond this, modification of the training method was used to introduce a geometrically more complex crystalline order. Here, actuation in the form of a decrease and an increase in sample thickness and specimen twisting and untwisting were witnessed. The novel semi-crystalline polymer actuator highlights an enormous potential for realizing versatile reversible shape changes in elastomers.…
Autor*innen: | Martin Bothe, Thorsten Pretsch |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Eigenverlag BAM |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of materials chemistry A |
Jahr der Erstveröffentlichung: | 2013 |
Verlag: | RSC |
Verlagsort: | London [u.a.] |
Jahrgang/Band: | 1 |
Ausgabe/Heft: | 46 |
Erste Seite: | 14491 |
Letzte Seite: | 14497 |
Freie Schlagwörter: | Bidrectional actuation; Hermann's orientation function; In situ wide-angle X-ray scattering; Mechanical properties; Microscopic model; Phase change; Poly(1,4-butylene adipate); Poly(ester urethane); Polymorphism; Reversible shape changes; Semi-crystallinity; Shape memory polymer; Stimuli-sensitive polymer; Thermoplastic polyurethane elastomer; Training; Two-way actuator; Two-way shape memory |
DOI: | 10.1039/c3ta13414h |
ISSN: | 2050-7496 |
ISSN: | 2050-7488 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 28.11.2013 |