Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by <italic style="font-style: italic">In situ</italic> Formation of Stereocomplex Polylactide

De-Yu Wei; Ni Chen; Zi-Wen Yin; Yan-Bo Li; Gao-Fei Zheng; Jun-Jia Bian; Hong-Wei Pan; Guo-Qiang Wang; Li-Ting He; Yan Zhao; Hui-Liang Zhang

doi:10.1007/s10118-025-3385-8

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Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by In situ Formation of Stereocomplex Polylactide

RESEARCH ARTICLE | Updated：2025-08-25

- Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by In situ Formation of Stereocomplex Polylactide
- Chinese Journal of Polymer Science Vol. 43, Issue 9, Pages: 1549-1564(2025)
- Affiliations：
  
  a.State Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester 01609, USA
  c.College of Material Science and Engineering, Jilin Jianzhu University, Changchun 130119, China
  d.Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong 999077, China
- Author bio：
  
  zhaoyan@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-025-3385-8
  CLC：
- Received：08 April 2025，
  
  Revised：2025-05-11，
  
  Accepted：21 May 2025，
  
  Online First：18 July 2025，
  
  Published：05 September 2025
- Accepted：
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Wei, D. Y.; Chen, N.; Yin, Z. W.; Li, Y. B.; Zheng, G. F.; Bian, J. J.; Pan, H. W.; Wang, G. Q.; He, L. T.; Zhao, Y.; Zhang, H. L. Crystallization properties, heat resistance, and hydrolytic resistance of poly(L-lactide)/poly(D-lactide) blend enhanced by in situ formation of stereocomplex polylactide. Chinese J. Polym. Sci. 2025, 43, 1549–1564

De-Yu Wei, Ni Chen, Zi-Wen Yin, et al. Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by In situ Formation of Stereocomplex Polylactide[J]. Chinese Journal of Polymer Science, 2025, 43(9): 1549-1564. DOI: 10.1007/s10118-025-3385-8.
Wei, D. Y.; Chen, N.; Yin, Z. W.; Li, Y. B.; Zheng, G. F.; Bian, J. J.; Pan, H. W.; Wang, G. Q.; He, L. T.; Zhao, Y.; Zhang, H. L. Crystallization properties, heat resistance, and hydrolytic resistance of poly(L-lactide)/poly(D-lactide) blend enhanced by in situ formation of stereocomplex polylactide. Chinese J. Polym. Sci. 2025, 43, 1549–1564 DOI： 10.1007/s10118-025-3385-8.

De-Yu Wei, Ni Chen, Zi-Wen Yin, et al. Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by In situ Formation of Stereocomplex Polylactide[J]. Chinese Journal of Polymer Science, 2025, 43(9): 1549-1564. DOI: 10.1007/s10118-025-3385-8. DOI：

摘要

The effect of in situ formation of the stereocomplex polylactide (sc-PLA) on the crystallization behavior of poly(L-lactide)/poly(D-lactide) (PLLA/PDLA) blends was assessed. The crystallization of PLLA was promoted by the situ formation of sc-PLA. Compared to neat PLLA

the heat resistance and hydrolytic resistance of PLLA/PDLA blends were significantly enhanced.

Abstract

Herein

the effect of

in situ

formation of the stereocomplex polylactide (sc-PLA) on the crystallization behaviors of poly(L-lactide)/poly(D-lactide) (PLLA/PDLA) blends was assessed. When the melt-blending temperature of the PLLA/PDLA blend approached the melting temperature of sc-PLA (approximately 220 °C)

a higher relative content of sc-PLA was achieved. Additionally

the relative content of sc-PLA in the PLLA/PDLA blend increased progressively with the increase in PDLA content. Differential scanning c

alorimetry analysis revealed that the overall crystallization rate of the homocrystal polylactide were enhanced by the presence of sc-PLA. After crystallization at the same temperature (115 and 120 °C)

the PLLA/PDLA blends exhibited a shorter half-crystallization time compared to PLLA alone. The size of the microcrystals of PLLA decreased as the sc-PLA content increased. Furthermore

the storage modulus and complex viscosity of the PLLA/PDLA blend increased with higher sc-PLA content. Dynamic mechanical analysis indicated that the glass transition temperature of PLLA in the PLLA/PDLA blends increased with increasing sc-PLA content. Additionally

the Vicat softening temperature increased from 67.8 °C for PLLA alone to 164.7 °C for the PLLA/25PDLA blend

enhancing the heat resistance of the PLLA/PDLA blends. Compared to PLLA alone

the hydrolytic resistance of the PLLA/PDLA blends showed marked improvement.

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⁰

Crystallization Properties, Heat Resistance, and Hydrolytic Resistance of Poly(L-lactide)/Poly(D-lactide) Blend Enhanced by In situ Formation of Stereocomplex Polylactide

DOI：10.1007/s10118-025-3385-8

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