Elongational Flow-induced Crystallization of Poly(<sub>L</sub>-lactic acid) Telechelic Ionomers

Fan Liu; Shao-Yong Huang; Jian Tang; Quan Chen

doi:10.1007/s10118-024-3218-1

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Elongational Flow-induced Crystallization of Poly(_L-lactic acid) Telechelic Ionomers

RESEARCH ARTICLE | Updated：2024-12-03

- Elongational Flow-induced Crystallization of Poly(_L-lactic acid) Telechelic Ionomers
- Chinese Journal of Polymer Science Vol. 42, Issue 12, Pages: 1957-1965(2024)
- Affiliations：
  
  State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  tangjian@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-024-3218-1
  CLC：
- Received：05 July 2024，
  
  Revised：2024-07-27，
  
  Accepted：08 August 2024，
  
  Online First：21 October 2024，
  
  Published：01 December 2024
- Accepted：
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Liu, F.; Huang, S. Y.; Tang, J.; Chen, Q. Elongational flow-induced crystallization of poly(_L-lactic acid) telechelic ionomers. Chinese J. Polym. Sci. 2024, 42, 1957–1965 DOI: 10.1007/s10118-024-3218-1.

Fan Liu, Shao-Yong Huang, Jian Tang, et al. Elongational Flow-induced Crystallization of Poly(_L-lactic acid) Telechelic Ionomers[J]. Chinese Journal of Polymer Science, 2024, 42(12): 1957-1965. DOI: 10.1007/s10118-024-3218-1.
Liu, F.; Huang, S. Y.; Tang, J.; Chen, Q. Elongational flow-induced crystallization of poly(_L-lactic acid) telechelic ionomers. Chinese J. Polym. Sci. 2024, 42, 1957–1965 DOI: 10.1007/s10118-024-3218-1. DOI：

Fan Liu, Shao-Yong Huang, Jian Tang, et al. Elongational Flow-induced Crystallization of Poly(_L-lactic acid) Telechelic Ionomers[J]. Chinese Journal of Polymer Science, 2024, 42(12): 1957-1965. DOI: 10.1007/s10118-024-3218-1. DOI：

摘要

The critical work for the strain-induced formation of crystallization of unentangled or slightly entangled poly(L-lactic acid) telechelic ionomers depends on whether it appears before or after the stress overshoot attributable to strain-induced ion dissociation.

Abstract

In this study

we prepared unentangled and slightly entangled poly(

-lactic acid) telechelic ionomer samples (

=5 and 16 kg/mol) based on sodium sulfonate groups. The telechelic samples exhibit extremely slow crystallization kinetics below the melting temperature

and above the glass transition temperature

which enables us to examine the linear viscoelasticity of the ionomer melt samples therein. The application of either the shear flow (at 85 °C) or elongational flow (between 70 and 90 °C) strongly accelerates the crystallization

leading to strong strain hardening and formation of highly oriented

crystals. Depending on the relative average rates of the strain-induced dissociation and strain-induced crystallization

the stress evolution can be classified into two cases

and the critical work for strain-induced crystallization is higher in case where the strain-induced dissociation occurs earlier than the strain-induced crystallization.

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references

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Elongational Flow-induced Crystallization of Poly(L-lactic acid) Telechelic Ionomers

DOI：10.1007/s10118-024-3218-1

摘要

Abstract

关键词

Keywords

references

Elongational Flow-induced Crystallization of Poly(_L-lactic acid) Telechelic Ionomers