Water governs the mechanical properties of poly(vinyl alcohol)
Article
Article Title | Water governs the mechanical properties of poly(vinyl alcohol) |
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ERA Journal ID | 1688 |
Article Category | Article |
Authors | Li, Lujuan (Author), Xu, Xiaodong (Author), Liu, Lei (Author), Song, Pingan (Author), Cao, Qianqian (Author), Xu, Zhiguang (Author), Fang, Zhengping (Author) and Wang, Hao (Author) |
Journal Title | Polymer |
Journal Citation | 213, pp. 1-12 |
Article Number | 123330 |
Number of Pages | 12 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0032-3861 |
1873-2291 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.polymer.2020.123330 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0032386120311551 |
Abstract | The presence of water molecules can significantly determine the macroscopic mechanical property and microscopic chain dynamics of poly(vinyl alcohol) (PVA). However, to date it has remained fully understood the molecular mechanism behind experimentally and theoretically. Herein, we systematically examine the effect of water contents on the mechanical property, glass transition, free volume, and intermolecular interactions by combining experimental and MD simulation. Our results show that the presence of water significantly reduces the mechanical strength of PVA, and only 1.8 wt% of water reduces the tensile strength by ~32% but notably increases the plasticity of PVA by ~2.5 times. Meanwhile, the inclusion of water remarkably lowers the glass transition temperature, increases free volume, and promotes the relaxation and mobility of PVA chains. This is mainly because the presence of water gives rise to both the plasticization and even lubricating effect on the PVA chains. This work unravels how water governs the mechanical performances of the PVA. |
Keywords | Polyvinyl alcohol; Water contents; Hydrogen bonding; Mechanical property; Molecular simulation |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
340309. Theory and design of materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Future Materials |
Zhejiang A & F University, China | |
Jiaxing University, China | |
China-Australia Institute for Advanced Materials and Manufacturing, China | |
NingboTech University, China | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) Grant ID DP190102992 |
Funding source | Australian Research Council (ARC) Grant ID FT190100188 |
https://research.usq.edu.au/item/q6vq7/water-governs-the-mechanical-properties-of-poly-vinyl-alcohol
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