Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites

Hua-Gao Fang; Kang-Jie Yang; Qi-Zheng Xie; Xu Chen; Sheng-Li Wu; Yun-Sheng Ding

doi:10.1007/s10118-021-2635-7

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Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites

Papers | Updated：2021-11-04

- Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites
- Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites
- Chinese Journal of Polymer Science 2022年40卷第1期页码：93-106
- Affiliations：
  
  a.Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
  b.Anhui Province Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China
  c.Anhui Institute for Food and Drug Control, Hefei 230051, China
- Author bio：
  
  fanghg@hfut.edu.cn (H.G.F.)
  wazxh526@163.com (S.L.W.)
  dingys@hfut.edu.cn (Y.S.D.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51503055 and 51673056) and the Fundamental Research Funds for the Central Universities (No. PA2020GDKC0009).
- DOI：10.1007/s10118-021-2635-7
  中图分类号：
- 收稿：2021-07-01，
  
  修回：2021-7-31，
  
  录用：2021-8-4，
  
  网络首发：2021-11-04，
  
  纸质出版：2022-01-01
- Accepted：
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Fang, H. G.; Yang, K. J.; Xie, Q. Z.; Chen, X.; Wu, S. L.; Ding, Y. S. Influence of interfacial enantiomeric grafting on melt rheology and crystallization of polylactide/cellulose nanocrystals composites. Chinese J. Polym. Sci. 2022, 40, 93–106

Hua-Gao Fang, Kang-Jie Yang, Qi-Zheng Xie, et al. Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites[J]. Chinese Journal of Polymer Science, 2022, 40(1): 93-106.
Fang, H. G.; Yang, K. J.; Xie, Q. Z.; Chen, X.; Wu, S. L.; Ding, Y. S. Influence of interfacial enantiomeric grafting on melt rheology and crystallization of polylactide/cellulose nanocrystals composites. Chinese J. Polym. Sci. 2022, 40, 93–106 DOI： 10.1007/s10118-021-2635-7.

Hua-Gao Fang, Kang-Jie Yang, Qi-Zheng Xie, et al. Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites[J]. Chinese Journal of Polymer Science, 2022, 40(1): 93-106. DOI： 10.1007/s10118-021-2635-7.

摘要

Abstract

Incorporating the surface-grafted cellulose nanocrystals (CNCs) with enantiomeric polylactide (PLLA or PDLA) is an effective and sustainable way to modify PLLA

but their difference in promoting matrix crystallization is still unrevealed. In this study

the CNCs with identical content and length of PLLA and PDLA (CNC-

-L and CNC-

-D) were prepared and blended with PLLA. The rheological properties of PLLA/CNC-

-D are greatly improved

indicating that the stereocomplexation can significantly improve the interfacial strength as compared with the conventional van der Waals force in PLLA/CNC-

-L. Surprisingly

the matrix crystallizes at a higher rate in PLLA/CNC-

-L than PLLA/CNC-

-D. PLLA/CNC-

-L15 reaches its half crystallinity in 8.26 min while a longer period of 13.41 min is required for PLLA/CNC-

-D15. POM observation reveals that the superior crystallization behavior in PLLA/CNC-

-L is originated from its higher nucleation efficiency and faster growth rate. The formation of low content of sc-PLA at the interface can restrict the diffusion of PLLA but contribute less to generate crystalline nuclei

which synergistically leads to the retarded crystallization kinetics in PLLA/CNC-

-D. Revealing the mechanism of different interfacial enantiomeric grafting on the melt rheology and crystallization of PLLA is of great significance for the development of high-performance polylactide materials.

关键词

Keywords

references

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