Abstract
Two-way shape memory polymer can exhibit reversible shape transformation, which shows great application potential as a smart material. It is necessary to develop new reversible shape memory composite systems to achieve accurate and wide-range control of two-way shape memory behavior, especially under the condition of no external force. A chemically cross-linked two-component crystalline block copolymer was prepared, and the mechanism of two-way shape memory behavior under stress-free condition of the material was revealed. The results show that both the crystallization and thermal property of PLA/PCL-PU can be significantly changed by adjusting the proportion between PLA and PCL, and the dosage of crosslinking agent, and thus the shape memory property of PLA/PCL-PU can be regulated accordingly. The two-way shape recovery rate of the material can reach to 41.11%. This work provides a facile strategy to fabricate a biodegradable thermally induced two-way shape memory material under the stress-free condition with tunable shape memory properties.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work is supported by the Natural Science Foundation of Heilongjiang Province of China (E2018003), the Fundamental Research Funds for the Central Universities (2572018BC31), and the National Natural Science Foundation of China (52273066).
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H. Yang and R. Shi contributed to the study conception and design. Material preparation and data collection were performed by H. Yang and R. Shi. H. Yang, R. Shi, Q. Jiang, and J. Ren conducted data analysis and discussion. The manuscript was written by H. Yang, R. Shi, Q. Jiang, and J. Ren. All authors read and approved the final manuscript.
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Yang, H., Shi, R., Jiang, Q. et al. Properties and mechanism of two-way shape memory polyurethane composite under stress-free condition. Adv Compos Hybrid Mater 6, 1 (2023). https://doi.org/10.1007/s42114-022-00585-1
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DOI: https://doi.org/10.1007/s42114-022-00585-1