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The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films

The modification mechanism and the effect of MgCl(2) on poly(vinyl alcohol) and the effect of water in the system were studied in this paper. The effect of MgCl(2) on different fully dried PVA was investigated by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calor...

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Detalles Bibliográficos
Autores principales: Du, Wenhao, Jiang, Li, Shi, Mengke, Yang, Zhaojie, Zhang, Xi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059634/
https://www.ncbi.nlm.nih.gov/pubmed/35518027
http://dx.doi.org/10.1039/c8ra09958h
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author Du, Wenhao
Jiang, Li
Shi, Mengke
Yang, Zhaojie
Zhang, Xi
author_facet Du, Wenhao
Jiang, Li
Shi, Mengke
Yang, Zhaojie
Zhang, Xi
author_sort Du, Wenhao
collection PubMed
description The modification mechanism and the effect of MgCl(2) on poly(vinyl alcohol) and the effect of water in the system were studied in this paper. The effect of MgCl(2) on different fully dried PVA was investigated by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimeter, thermogravimetric analysis, water content test, dynamic thermomechanical analysis and tensile test, respectively. The results showed that MgCl(2) was an effective strengthening agent, which could crosslink with PVA and then effectively decrease the crystallinity of PVA. With the addition of MgCl(2), the strength and rigidity of PVA increased and the melting temperature decreased. The effect of MgCl(2) on thermal stability of PVA was related to the alcoholysis degree of PVA. The tensile strength of PVA films modified with MgCl(2) were all over 120 MPa. Moreover, the effect of MgCl(2) on the dynamic thermomechanical properties and tensile properties of PVA with various content of water was studied. Water could interact with MgCl(2) to destroy the crosslink between MgCl(2) and PVA. In the presence of water, PVA modified with MgCl(2) became soft, with lower tensile strength and higher elongation at break.
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spelling pubmed-90596342022-05-04 The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films Du, Wenhao Jiang, Li Shi, Mengke Yang, Zhaojie Zhang, Xi RSC Adv Chemistry The modification mechanism and the effect of MgCl(2) on poly(vinyl alcohol) and the effect of water in the system were studied in this paper. The effect of MgCl(2) on different fully dried PVA was investigated by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimeter, thermogravimetric analysis, water content test, dynamic thermomechanical analysis and tensile test, respectively. The results showed that MgCl(2) was an effective strengthening agent, which could crosslink with PVA and then effectively decrease the crystallinity of PVA. With the addition of MgCl(2), the strength and rigidity of PVA increased and the melting temperature decreased. The effect of MgCl(2) on thermal stability of PVA was related to the alcoholysis degree of PVA. The tensile strength of PVA films modified with MgCl(2) were all over 120 MPa. Moreover, the effect of MgCl(2) on the dynamic thermomechanical properties and tensile properties of PVA with various content of water was studied. Water could interact with MgCl(2) to destroy the crosslink between MgCl(2) and PVA. In the presence of water, PVA modified with MgCl(2) became soft, with lower tensile strength and higher elongation at break. The Royal Society of Chemistry 2019-01-11 /pmc/articles/PMC9059634/ /pubmed/35518027 http://dx.doi.org/10.1039/c8ra09958h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Du, Wenhao
Jiang, Li
Shi, Mengke
Yang, Zhaojie
Zhang, Xi
The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title_full The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title_fullStr The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title_full_unstemmed The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title_short The modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
title_sort modification mechanism and the effect of magnesium chloride on poly(vinyl alcohol) films
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059634/
https://www.ncbi.nlm.nih.gov/pubmed/35518027
http://dx.doi.org/10.1039/c8ra09958h
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