Enthalpy of sorption by glassy polymers

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Enthalpy of sorption by glassy polymers

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dc.contributor.author Kocherbitov, Vitaly
dc.contributor.author Argatov, Ivan
dc.date.accessioned 2019-05-17T13:08:17Z
dc.date.available 2019-05-17T13:08:17Z
dc.date.issued 2019 en_US
dc.identifier.issn 0032-3861 en_US
dc.identifier.uri http://hdl.handle.net/2043/28616
dc.description.abstract Thermodynamics and molecular mechanisms of sorption of gases and liquids by glassy polymers and are still not fully understood. In particular, the enthalpy of sorption (or mixing) in the glassy state – a parameter crucial for understanding the thermodynamics of sorption is not properly described by existing approaches. In this work, we propose a thermodynamic theory that describes the effect of the glass transition on the enthalpy of sorption. Firstly, a rigorous thermodynamic expression for the sorption enthalpy is presented, and then equations applicable for practical calculations are derived using certain approximations. The theory presented here is tested on the experimental water sorption data on starch and cellulose. The equations describing the hydration enthalpy are in excellent agreement with experimental data. Remarkably, the glass transition-induced apparent heat capacity change for water in carbohydrate polymers turned out to be negative. Being counterintuitive, this result can however be supported by re-evaluation of the literature data on heat capacities of the starch-water system. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.subject Enthalpy en_US
dc.subject Sorption en_US
dc.subject Hydration en_US
dc.subject Calorimetry en_US
dc.subject Glass transition en_US
dc.subject Heat capacity en_US
dc.subject Starch en_US
dc.subject cellulose en_US
dc.subject Glassy state en_US
dc.subject Carbohydrate polymers en_US
dc.subject Thermodynamics en_US
dc.subject Mixing enthalpy en_US
dc.subject Partial molar enthalpy of mixing en_US
dc.subject.classification Sciences en_US
dc.title Enthalpy of sorption by glassy polymers en_US
dc.type Article, peer reviewed scientific en_US
dc.contributor.department Malmö University. Faculty of Health and Society
dc.contributor.department Malmö University. Biomedical Sciences (BMV)
dc.identifier.doi 10.1016/j.polymer.2019.04.051 en_US
dc.subject.srsc Research Subject Categories::NATURAL SCIENCES en_US
dc.relation.ispartofpublication Polymer;
dc.relation.ispartofpublicationvolume 174 en_US
dc.date.embargoEndDate 2021-04-22
dc.description.authorversion Yes en_US
dc.identifier.isiid 000469028200005
dc.contributor.centre Malmö University. Biofilms - Research Center for Biointerfaces en_US
dc.format.ePage 37 en_US
dc.format.sPage 33 en_US
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