Journal
REACTIVE & FUNCTIONAL POLYMERS
Volume 72, Issue 10, Pages 757-764Publisher
ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2012.07.013
Keywords
Shape memory polymer; Polyurethane; Micro fibers/springs; Self-winding; Self-twisting/untwisting
Funding
- National Natural Science Foundation of China [10902073]
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Chemically induced morphing in polyurethane shape memory polymer (SMP) micro fibers/springs was investigated experimentally and theoretically. It was revealed that at the presence of water/ethanol, the release of the residual strain/stress (captured during the fabrication process of micro fibers/springs from melted polyurethane SMP) is the driving force for morphing (by means of self-winding and selft-wisting/untwisting). A theoretical model was developed to explain the underlying mechanisms behind all types of observed morphing phenomena. (C) 2012 Elsevier Ltd. All rights reserved.
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