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SANS/WANS Time-resolving Neutron Scattering Studiesof Polymer Phase Transitions Using NIMROD

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datacite.subject.fosEngenharia e Tecnologia::Engenharia dos Materiais
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg12:Produção e Consumo Sustentáveis
dc.contributor.authorMitchell, Geoffrey Robert
dc.contributor.authorBowron, Daniel
dc.contributor.authorMateus, Artur
dc.contributor.authorBártolo, Paulo
dc.contributor.authorGkourmpis, Thomas
dc.contributor.authorPhomphrai, Khamphee
dc.contributor.authorLopez, Daniel
dc.contributor.authorDavis, Fred
dc.date.accessioned2026-04-17T10:28:36Z
dc.date.available2026-04-17T10:28:36Z
dc.date.issued2013
dc.description.abstractABSTRACT We use new neutron scattering instrumentation to follow in a single quantitative time-resolving experiment, the three key scales of structural development which accompany the crystallisation of synthetic polymers. These length scales span 3 orders of magnitude of the scattering vector. The study of polymer crystallisation dates back to the pioneering experiments of Keller and others who discovered the chain-folded nature of the thin lamellae crystals which are normally found in synthetic polymers. The inherent connectivity of polymers makes their crystallisation a multiscale transformation. Much understanding has developed over the intervening fifty years but the process has remained something of a mystery. There are three key length scales. The chain folded lamellar thickness is ∼ 10nm, the crystal unit cell is ∼ 1nm and the detail of the chain conformation is ∼ 0.1nm. In previous work these length scales have been addressed using different instrumention or were coupled using compromised geometries. More recently researchers have attempted to exploit coupled time-resolved small-angle and wide-angle x-ray experiments. These turned out to be challenging experiments much related to the challenge of placing the scattering intensity on an absolute scale. However, they did stimulate the possibility of new phenomena in the very early stages of crystallisation. Although there is now considerable doubt on such experiments, they drew attention to the basic question as to the process of crystallisation in long chain molecules. We have used NIMROD on the second target station at ISIS to follow all three length scales in a time-resolving manner for poly(e-caprolactone). The technique can provide a single set of data from 0.01 to 100Å-1 on the same vertical scale. We present the results using a multiple scale model of the crystallisation process in polymers to analyse the results.eng
dc.description.sponsorshipThe neutron scattering was obtained at the STFC’s ISIS Pulsed Neutron Source Facility Oxford shire UK. The work was supported by the FCT (Portugal).
dc.identifier.citationMitchell, G.R., Bowron, D., Mateus, A. et al. SANS/WANS Time-resolving Neutron Scattering Studiesof Polymer Phase Transitions Using NIMROD. MRS Online Proceedings Library 1528, 604 (2013). https://doi.org/10.1557/opl.2013.363
dc.identifier.doi10.1557/opl.2013.363
dc.identifier.isbn978-163266118-0
dc.identifier.issn0272-9172
dc.identifier.issn1946-4274
dc.identifier.urihttp://hdl.handle.net/10400.8/16137
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.relation.hasversionhttps://link.springer.com/article/10.1557/opl.2013.363
dc.relation.ispartofMRS Proceedings
dc.rights.uriN/A
dc.subjectChains
dc.subjectExperiments
dc.subjectNeutron scattering
dc.titleSANS/WANS Time-resolving Neutron Scattering Studiesof Polymer Phase Transitions Using NIMRODeng
dc.typeconference paper
dspace.entity.typePublication
oaire.citation.conferenceDate2013
oaire.citation.endPage88
oaire.citation.startPage83
oaire.citation.titleMaterials Research Society Symposium Proceedings
oaire.citation.volume1528
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMitchell
person.familyNameMateus
person.familyNameBartolo
person.givenNameGeoffrey
person.givenNameArtur
person.givenNamePaulo
person.identifier166356
person.identifier203086
person.identifier.ciencia-idE41A-ABDD-1FC7
person.identifier.ciencia-id0E1A-9A57-E79A
person.identifier.ciencia-id5810-9BF9-4522
person.identifier.orcid0000-0001-7977-7610
person.identifier.orcid0000-0003-2483-9153
person.identifier.orcid0000-0003-3683-726X
person.identifier.ridH-3387-2018
person.identifier.ridF-2421-2013
person.identifier.scopus-author-id7403103397
person.identifier.scopus-author-id14028690000
person.identifier.scopus-author-id6603353041
relation.isAuthorOfPublication48c8066b-023e-4405-b462-49d28af000d1
relation.isAuthorOfPublication1dfafb6b-cec8-4769-ac8e-76dbd0209077
relation.isAuthorOfPublicationab44d1ae-46d0-45c2-b19f-200024b5a990
relation.isAuthorOfPublication.latestForDiscovery48c8066b-023e-4405-b462-49d28af000d1

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