Regulating the Characteristic Networks of Biodegradable Poly(L-malic acid-ε-caprolactone) Shape Memory Materials: From Plastics to Elastomers
作者：Jing Song, Jiali Jiao, Chenguang Jiang, Yaxin Qiu*, Defeng Wu*
關鍵字：poly(L-malic acid); three-arm poly(ε-caprolactone); thermosets; crosslinks; mechanical state; shape-memory effect
論文來源：期刊
發表時間：2025年
Biomacromolecules, 2025,Vol 26/Issue 4
Developing new biodegradable polyesters with well-defined structures is of interest. We reported an attractive two-component aliphatic polyester-based thermoset, which was prepared via the esterification of biomass-derived L-malic acid (LMA) oligomers and three-arm poly(ε-caprolactone) (3a-PCL) triols. Chemical network formed via the ester bonding and physical network caused by the crystallization of 3a-PCL arm chain coexist in the thermoset, and the competition of the two characteristic networks leads to a negative correlation between the degree of covalent crosslinking and the degree of crystallization, thereby the mechanical state of the thermosets can be easily tuned: from plastic to elastomer state. Moreover, the crystallization temperature and melting point of the thermosets range in 30 oC~50 oC and -7 oC~18 oC, respectively, which are favorable of shape morphing as the thermosets are used as shape memory materials. This work also provides valuable information on tailoring the mechanical and thermal properties of star-shaped polyester-based thermosets.
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https://pubs.acs.org/doi/full/10.1021/acs.biomac.5c00163