Abstract
Fully biodegradable blends with low shape memory recovery temperature were obtained based on poly(lactic acid) (PLA) and poly(propylene carbonate) (PPC). By virtue of their similar chemical structures, in situ cross-linking reaction initiated by dicumyl peroxide (DCP) between PLA and PPC chains was realized in PLA/PPC blends. Therefore, the compatibility between PLA and PPC was increased, which obviously changed the phase structures and increased the elongation at break of the blends. The compatibilized blends had a recovery performance at 45 °C. Combining the changes of phase structures, the mechanism of the shape memory was discussed. It was demonstrated that in situ compatibilization by dicumyl peroxide was effective to obtain eco-friendly PLA/PPC blends with good mechanical and shape memory properties.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (No. 51503117) and the Innovation Foundation for Graduate Students of Shandong University of Science and Technology, China (No. SDKDYC170334).
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Qin, SX., Yu, CX., Chen, XY. et al. Fully Biodegradable Poly(lactic acid)/Poly(propylene carbonate) Shape Memory Materials with Low Recovery Temperature Based on in situ Compatibilization by Dicumyl Peroxide. Chin J Polym Sci 36, 783–790 (2018). https://doi.org/10.1007/s10118-018-2065-3
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DOI: https://doi.org/10.1007/s10118-018-2065-3