Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by <italic style="font-style: italic">In situ</italic> Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis

Zi-Shuo Wu; Jia-Ying Deng; Wei Chen

doi:10.1007/s10118-025-3381-z

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Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by In situ Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis

RESEARCH ARTICLE | Updated：2025-08-25

- Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by In situ Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis
- Chinese Journal of Polymer Science Vol. 43, Issue 9, Pages: 1671-1680(2025)
- Affiliations：
  
  School of Nuclear Science and Technology, National Synchrotron Radiation Laboratory, State Key Laboratory of Advanced Glass Materials, Anhui Provincial Engineering Research Center for Advanced Functional Polymer Films, University of Science and Technology of China, Hefei 230029, China
- Author bio：
  
  wc003@ustc.edu.cn
- Funds：
- DOI：10.1007/s10118-025-3381-z
  CLC：
- Received：14 April 2025，
  
  Revised：2025-05-06，
  
  Accepted：12 May 2025，
  
  Online First：08 July 2025，
  
  Published：05 September 2025
- Accepted：
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Wu, Z. S.; Deng, J. Y.; Chen, W. Tensile deformation mechanism of glycerol plasticized poly(vinyl alcohol) film as elucidated by in situ synchrotron radiation X-ray scattering: the critical role of hydrolysis. Chinese J. Polym. Sci. 2025, 43, 1671–1680

Zi-Shuo Wu, Jia-Ying Deng, Wei Chen. Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by In situ Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis[J]. Chinese Journal of Polymer Science, 2025, 43(9): 1671-1680. DOI: 10.1007/s10118-025-3381-z.
Wu, Z. S.; Deng, J. Y.; Chen, W. Tensile deformation mechanism of glycerol plasticized poly(vinyl alcohol) film as elucidated by in situ synchrotron radiation X-ray scattering: the critical role of hydrolysis. Chinese J. Polym. Sci. 2025, 43, 1671–1680 DOI： 10.1007/s10118-025-3381-z.

Zi-Shuo Wu, Jia-Ying Deng, Wei Chen. Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by In situ Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis[J]. Chinese Journal of Polymer Science, 2025, 43(9): 1671-1680. DOI: 10.1007/s10118-025-3381-z. DOI：

摘要

The present work elucidates the laws governing the influence of chain defects and temperature on the nonlinear mechanical behavior of polyvinyl alcohol films. By analyzing the effect of chain defects (vinyl acetate units) on the crystallization behavior of poly(vinyl alcohol)

an intrinsic mechanism that favors stretching-induced new crystal formation at high temperatures and low alcoholysis degree has been revealed.

Abstract

The deformation mechanism of glycerol plasticized poly(vinyl alcohol) (PVA) with different hydrolyses (88%

92%

98%) at elevated temperatures (60‒100 °C) was elucidated by

in situ

synchrotron radiation X-ray scattering. The vinyl acetate (VAc) in PVA acts as a non-crystalline chain defect

which significantly influences the plastic deformation and stretching-induced crystallization behavior of PVA. The key microstructural parameters of PVA during deformation

such as crystallinity (

)

lateral crystallite size (

)

and long period (l)

in combination with the stress-strain curves

were obtained. The experimental results show that the deformation process of the plasticized PVA film present a three-stage evolution: (i) a plastic deformation zone. The plastic deformation of the crystallite occurs as evidenced by the apparent decrease in crystallinity and lamellar reorientation induced by stretching; (ii) the stress softening zone. The decreasing trend of crystallinity becomes slow

and the long period becomes smaller

which indicates that PVA crystallization is induced by stretching; and (iii) the strain-hardening zone. There is a synergistic effect between the crystallite destruction and formation. Further research reveals that a high temperature and low degree of alcoholysis favor the stretching-induced crystallization of PVA

while the system with a high degree of alcoholysis shows significant characteristics of preferred cr

ystal growth.

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Tensile Deformation Mechanism of Glycerol Plasticized Poly(vinyl alcohol) Film as Elucidated by In situ Synchrotron Radiation X-ray Scattering: the Critical Role of Hydrolysis

DOI：10.1007/s10118-025-3381-z

摘要

Abstract

关键词

Keywords

references