Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees

In recent years, inverse gas chromatography (IGC) and molecular dynamics simulation methods have been used to characterize the solubility parameters and surface parameters of polymers, which can provide quantitative reference for the further study of the surface and interface compatibility of polyme...

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Autores principales: Siqi Chen, Hao Yang, Kui Huang, Xiaolong Ge, Hanpeng Yao, Junxiang Tang, Junxue Ren, Shixue Ren, Yanli Ma
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
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PVA
IGC
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spelling oai:doaj.org-article:28ade6924fb04a8794dc30726ab05fef2021-11-11T18:47:14ZQuantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees10.3390/polym132137782073-4360https://doaj.org/article/28ade6924fb04a8794dc30726ab05fef2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3778https://doaj.org/toc/2073-4360In recent years, inverse gas chromatography (IGC) and molecular dynamics simulation methods have been used to characterize the solubility parameters and surface parameters of polymers, which can provide quantitative reference for the further study of the surface and interface compatibility of polymer components in the future. In this paper, the solubility parameters and surface parameters of two kinds of common alcoholysis, PVA<sub>88</sub> and PVA<sub>99</sub>, are studied by using the IGC method. The accuracy of the solubility parameters obtained by the IGC experiment is verified by molecular dynamics simulation. On the basis of this, the influence of repeated units of polyvinyl alcohol (PVA) on solubility parameters is studied, so as to determine the appropriate chain length of the PVA for simulation verification calculation. The results show that the solubility parameters are not much different when the PVA chain length is 30 and above; the numerical trends of the solubility parameters of PVA<sub>88</sub> and PVA<sub>99</sub> at room temperature are the same as the results of molecular dynamics simulation; the dispersive surface energy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">γ</mi><mi mathvariant="normal">s</mi><mi mathvariant="normal">d</mi></msubsup></mrow></semantics></math></inline-formula> and the specific surface energy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">γ</mi><mi mathvariant="normal">s</mi><mrow><mi>sp</mi></mrow></msubsup></mrow></semantics></math></inline-formula> are scattered with the temperature distribution and have a small dependence on temperature. On the whole, the surface energy of PVA<sub>99</sub> with a higher alcoholysis degree is higher than that of PVA<sub>88</sub> with a lower alcoholysis degree. The surface specific adsorption free energy (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msup><mi mathvariant="normal">G</mi><mrow><mi>sp</mi></mrow></msup></mrow></semantics></math></inline-formula>) indicates that both PVA<sub>88</sub> and PVA<sub>99</sub> are amphoteric meta-acid materials, and the acidity of PVA<sub>99</sub> is stronger.Siqi ChenHao YangKui HuangXiaolong GeHanpeng YaoJunxiang TangJunxue RenShixue RenYanli MaMDPI AGarticlePVAsolubility parameterIGCalcoholicitymolecular dynamics simulationsurface propertiesOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3778, p 3778 (2021)
institution DOAJ
collection DOAJ
language EN
topic PVA
solubility parameter
IGC
alcoholicity
molecular dynamics simulation
surface properties
Organic chemistry
QD241-441
spellingShingle PVA
solubility parameter
IGC
alcoholicity
molecular dynamics simulation
surface properties
Organic chemistry
QD241-441
Siqi Chen
Hao Yang
Kui Huang
Xiaolong Ge
Hanpeng Yao
Junxiang Tang
Junxue Ren
Shixue Ren
Yanli Ma
Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
description In recent years, inverse gas chromatography (IGC) and molecular dynamics simulation methods have been used to characterize the solubility parameters and surface parameters of polymers, which can provide quantitative reference for the further study of the surface and interface compatibility of polymer components in the future. In this paper, the solubility parameters and surface parameters of two kinds of common alcoholysis, PVA<sub>88</sub> and PVA<sub>99</sub>, are studied by using the IGC method. The accuracy of the solubility parameters obtained by the IGC experiment is verified by molecular dynamics simulation. On the basis of this, the influence of repeated units of polyvinyl alcohol (PVA) on solubility parameters is studied, so as to determine the appropriate chain length of the PVA for simulation verification calculation. The results show that the solubility parameters are not much different when the PVA chain length is 30 and above; the numerical trends of the solubility parameters of PVA<sub>88</sub> and PVA<sub>99</sub> at room temperature are the same as the results of molecular dynamics simulation; the dispersive surface energy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">γ</mi><mi mathvariant="normal">s</mi><mi mathvariant="normal">d</mi></msubsup></mrow></semantics></math></inline-formula> and the specific surface energy <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi mathvariant="sans-serif">γ</mi><mi mathvariant="normal">s</mi><mrow><mi>sp</mi></mrow></msubsup></mrow></semantics></math></inline-formula> are scattered with the temperature distribution and have a small dependence on temperature. On the whole, the surface energy of PVA<sub>99</sub> with a higher alcoholysis degree is higher than that of PVA<sub>88</sub> with a lower alcoholysis degree. The surface specific adsorption free energy (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msup><mi mathvariant="normal">G</mi><mrow><mi>sp</mi></mrow></msup></mrow></semantics></math></inline-formula>) indicates that both PVA<sub>88</sub> and PVA<sub>99</sub> are amphoteric meta-acid materials, and the acidity of PVA<sub>99</sub> is stronger.
format article
author Siqi Chen
Hao Yang
Kui Huang
Xiaolong Ge
Hanpeng Yao
Junxiang Tang
Junxue Ren
Shixue Ren
Yanli Ma
author_facet Siqi Chen
Hao Yang
Kui Huang
Xiaolong Ge
Hanpeng Yao
Junxiang Tang
Junxue Ren
Shixue Ren
Yanli Ma
author_sort Siqi Chen
title Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
title_short Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
title_full Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
title_fullStr Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
title_full_unstemmed Quantitative Study on Solubility Parameters and Related Thermodynamic Parameters of PVA with Different Alcoholysis Degrees
title_sort quantitative study on solubility parameters and related thermodynamic parameters of pva with different alcoholysis degrees
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/28ade6924fb04a8794dc30726ab05fef
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