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Self-Healing Shape Memory PUPCL Copolymer with High Cycle Life
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
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2018 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 28, no 7, article id 1704109Article in journal (Refereed) Published
Abstract [en]

New polyurethane-based polycaprolactone copolymer networks, with shape recovery properties, are presented here. Once deformed at ambient temperature, they show 100% shape fixation until heated above the melting point, where they recover the initial shape within 22 s. In contrast to current shape memory materials, the new materials do not require deformation at elevated temperature. The stable polymer structure of polyurethane yields a copolymer network that has strength of 10 MPa with an elongation at break of 35%. The copolymer networks are self-healing at a slightly elevated temperature (70 degrees C) without any external force, which is required for existing self-healing materials. This allows for the new materials to have a long life of repeated healing cycles. The presented copolymers show features that are promising for applications as temperature sensors and activating elements.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2018. Vol. 28, no 7, article id 1704109
Keywords [en]
Self-healing, shape memory, shape recovery, shape fixity, polyurethane and poly(caprolactone)
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-223789DOI: 10.1002/adfm.201704109ISI: 000424889900003Scopus ID: 2-s2.0-85037727618OAI: oai:DiVA.org:kth-223789DiVA, id: diva2:1188298
Note

QC 20180307

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-07Bibliographically approved

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Hedenqvist, Mikael S.

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