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Crystallisation behaviour of Pebax graphene composite matrix with and without supercritical carbon dioxide assisted polymer processing technique

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dc.contributor.author Karode, Nireeksha
dc.contributor.author Poudel, Anup
dc.contributor.author Fitzhenry, Laurence
dc.contributor.author Matthews, Siobhan
dc.contributor.author Redington, Wynette
dc.contributor.author Walsh, Philip
dc.contributor.author Coffey, Austin
dc.date.accessioned 2018-07-09T15:20:45Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10344/6948
dc.description peer-reviewed en_US
dc.description The full text of this article will not be available in ULIR until the embargo expires on the 29/05/2019
dc.description.abstract The paper presents an in-depth analysis on the crystallization kinetics of Pebax–graphene composites when processed with and without supercritical fluid carbon dioxide (scCO2) assisted extrusion at various graphene loading concentrations. Crystallization behavior was understood using the Avrami model for isothermal conditions and the Avrami, Ozawa, and combined Avrami-Ozawa model for non-isothermal conditions. The results from crystallization kinetics suggest that the crystal structure transformed from two-dimensional to three-dimensional when processed with scCO2. The overall crystallization rate decreases when the composite matrix was processed with scCO2 under both isothermal and non-isothermal conditions promoting possible exfoliation and crystal rearrangement resulting in homogenization of the composite matrix. The Arrhenius and Kissinger’s activation energy was calculated, which is indicative of restriction opposed by graphene exfoliation to nucleation and crystal growth when processed with scCO2. Crystallite size was calculated from the X-ray diffraction pattern using Scherrer’s equation, where the crystallite size tends to decrease when processed with scCO2 favoring the production of a homogeneous composite matrix due to crystal rearrangement and graphene exfoliation. en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.relation.ispartofseries Crystal Growth and Design;18 (7), pp. 3938-3952
dc.relation.uri http://dx.doi.org/10.1021/acs.cgd.8b00277
dc.rights © 2018 ACS This document is the Accepted Manuscript version of "Crystallisation Behaviour of Pebax Graphene Composite Matrix with and without supercritical carbon dioxide assisted polymer processing technique" that appeared in final form in Crystal Growth and Design, 2018, 18 (7), pp. 3938-3952 copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.cgd.8b00277 en_US
dc.subject supercritical fluid carbon dioxide en_US
dc.subject extrusion en_US
dc.subject crystallisation kinetics en_US
dc.title Crystallisation behaviour of Pebax graphene composite matrix with and without supercritical carbon dioxide assisted polymer processing technique en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1021/acs.cgd.8b00277
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor SFI en_US
dc.date.embargoEndDate 2019-05-29
dc.embargo.terms 2019-05-29 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US
dc.internal.rssid 2869087


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