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Deuterium NMR Study of Orientational Order in Cellulosic Network Microfibers

2010-07-13Journal article Open access
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dc.contributor.authorKundu, S.
dc.contributor.authorFeio, G.
dc.contributor.authorPinto, L. F. V.
dc.contributor.authorAlmeida, Pedro L.
dc.contributor.authorFigueirinhas, João
dc.contributor.authorGodinho, Maria Helena
dc.date.accessioned2011-11-28T12:40:13Z
dc.date.available2011-11-28T12:40:13Z
dc.date.issued2010-07-13
dc.description.abstractDeuterium NMR was used to investigate the orientational order in a composite cellulosic formed by liquid crystalline acetoxypropylcellulose (A PC) and demented nematic 4'-penty1-4-cyanobiphenyl (5CB-4 alpha d(2)) with the per centage of 85% A PC by weight Three forms of the composite including electro spun microfibers, thin film and bulk samples were analyzed The NMR results initially suggest two distinct scenarios, one whet e the 503-alpha d(2), is confined to small droplets with dimensions smaller than the magnetic coherence length and the other where the 503-alpha d(2) molecules arc aligned with the A PC network chains Polarized optical microscopy (POW from thin film samples along with all the NMR results show the presence of 5CB-alpha d(2) droplets in the composite systems with a nematic wetting layer at the APC-5CB-alpha d(2) interface that experiences and order disorder transition driven by the polymer network N-I transition The characterization of the APC network I-N transition shows a pronounced subcritical behavior within a heterogeneity scenario.por
dc.identifier.citationKundu S, Feio G, Pinto L F V, Almeida P L, Figueirinhas J L, Godinho M H.Deuterium NMR Study of Orientational Order in Cellulosic Network Microfibers.Macromolecules. 2010; 43 (13): 5749-5755.por
dc.identifier.issn0024-9297
dc.identifier.urihttp://hdl.handle.net/10400.21/666
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherAmer Chemical Socpor
dc.relation.ispartofseries13
dc.subjectLiquids-crystalspor
dc.subjectPhase-transitionpor
dc.subjectNanofiberspor
dc.subjectFiberspor
dc.subjectLayerpor
dc.titleDeuterium NMR Study of Orientational Order in Cellulosic Network Microfiberspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceWashingtonpor
oaire.citation.endPage5755por
oaire.citation.issue43por
oaire.citation.startPage5749por
oaire.citation.titleMacromoleculespor
person.familyNameMarques de Almeida
person.familyNameFigueirinhas
person.familyNameGodinho
person.givenNamePedro
person.givenNameJoão
person.givenNameMaria Helena
person.identifier2206212
person.identifier.ciencia-id0218-71B2-2DE0
person.identifier.ciencia-idCB1B-52B5-D425
person.identifier.ciencia-idC316-7B1F-4513
person.identifier.orcid0000-0001-7356-8455
person.identifier.orcid0000-0001-9254-1864
person.identifier.orcid0000-0002-9760-5983
person.identifier.ridB-4356-2009
person.identifier.ridA-4278-2013
person.identifier.ridJ-3679-2013
person.identifier.scopus-author-id57190384213
person.identifier.scopus-author-id55909453200
person.identifier.scopus-author-id7005654016
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication429b6d71-328e-42b3-8151-15493de249b8
relation.isAuthorOfPublication8287ac27-3195-4e9d-956f-63e80198f99e
relation.isAuthorOfPublication9e92c2e7-f179-42a4-b284-2b30b769aa0b
relation.isAuthorOfPublication.latestForDiscovery9e92c2e7-f179-42a4-b284-2b30b769aa0b

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