Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network

De-Yu Niu; Peng-Wu Xu; Si-Jie Xu; Jia-Xuan Li; Wei-Jun Yang; Pi-Ming Ma

doi:10.1007/s10118-023-2894-6

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Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network

RESEARCH ARTICLE | Updated：2023-06-14

- Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network
- Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network
- 高分子科学（英文版） 2023年41卷第7期页码：1093-1103
- Affiliations：
  
  The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Author bio：
  
  p.ma@jiangnan.edu.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 52073123, 51873082 and 52103032), the Distinguished Young Natural Science Foundation of Jiangsu Province (No. BK20200027) and the Natural Science Foundation of Jiangsu Province (No. BK20200606).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-023-2894-6.
- DOI：10.1007/s10118-023-2894-6
  中图分类号： M
- 收稿：2022-09-22，
  
  修回：2022-10-22，
  
  录用：2022-10-28，
  
  网络首发：2022-12-29，
  
  纸质出版：2023-07-01
- Accepted：
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Niu, D. Y.; Xu, P. W.; Xu, S. J.; Li, J. X.; Yang, W. J.; Ma, P. M. Robust poly(glycolic acid) films with crystal orientation and reinforcement of chain entanglement network. Chinese J. Polym. Sci. 2023, 41, 1093–1103

De-Yu Niu, Peng-Wu Xu, Si-Jie Xu, et al. Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network[J]. Chinese Journal of Polymer Science, 2023, 41(7): 1093-1103.
Niu, D. Y.; Xu, P. W.; Xu, S. J.; Li, J. X.; Yang, W. J.; Ma, P. M. Robust poly(glycolic acid) films with crystal orientation and reinforcement of chain entanglement network. Chinese J. Polym. Sci. 2023, 41, 1093–1103 DOI： 10.1007/s10118-023-2894-6.

De-Yu Niu, Peng-Wu Xu, Si-Jie Xu, et al. Robust Poly(glycolic acid) Films with Crystal Orientation and Reinforcement of Chain Entanglement Network[J]. Chinese Journal of Polymer Science, 2023, 41(7): 1093-1103. DOI： 10.1007/s10118-023-2894-6.

摘要

In the present work

PGA films with simultaneously enhanced strength

ductility and heat resistance are achieved via “casting-stretching-annealing” technology. The reinforced chain entanglement network of PGA induced by the intense extensional stress and the highly oriented crystals grown and refined during the stretching and annealing process endowed the improved ductility and strength of the PGA films

respectively.

Abstract

The inherent brittleness of biodegradable poly(glycolic acid) (PGA) restricts its utilization in the packaging field. Traditional toughening methods usually require additional components accompanied by a sacrifice of strength. In the present work

PGA films with simultaneously enhanced strength and ductility are achieved

via

“casting-stretching-annealing” technology. The reinforced chain entanglement network of PGA induced by the intense extensional stress and the highly oriented crystals grown and refined during the stretching and annealing process endowed the improved ductility and strength of the PGA films

respectively. The relationships among the stretching process

microstructure and mechanical properties of the PGA films have been systematically investigated. As a result

the PGA film (SA-2) with low stretch ratios exhibits excellent ductility with an increase in elongation at break from 22% to 220% and tensile strength from 56 MPa to 130 MPa. Meanwhile

the PGA film (SA-4) with large stretch ratios features much higher tensile strength (335 MPa) while maintaining good ductility (elongation at break of 66%). In addition

highly oriented crystals result in obvious enhancement of heat resistance and dimensional stability of the PGA films. Therefore

this work provides an effective route to fabricate PGA films with both high strength and ductility which may promote the application of PGA materials.

关键词

Keywords

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