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Structure-property relationships in polyimide molecular composites

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dc.contributor.author Bershtein, VA en
dc.contributor.author David, L en
dc.contributor.author Egorova, LM en
dc.contributor.author Kanapitsas, A en
dc.contributor.author Meszaros, O en
dc.contributor.author Pissis, P en
dc.contributor.author Sysel, P en
dc.contributor.author Yakushev, PN en
dc.date.accessioned 2014-03-01T01:18:22Z
dc.date.available 2014-03-01T01:18:22Z
dc.date.issued 2002 en
dc.identifier.issn 1432-8917 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/14961
dc.subject molecular composites en
dc.subject rigid rod-like polyimide en
dc.subject flexible-chain polyimide en
dc.subject structure-property relationships en
dc.subject dynamic heterogeneity en
dc.subject confinement effects en
dc.subject constraining effects en
dc.subject.classification Materials Science, Multidisciplinary en
dc.subject.other CREEP RATE SPECTROSCOPY en
dc.subject.other LASER INTERFEROMETER en
dc.subject.other SEGMENTAL DYNAMICS en
dc.subject.other T-G en
dc.subject.other HETEROGENEITY en
dc.subject.other RELAXATIONS en
dc.subject.other NETWORKS en
dc.subject.other BLENDS en
dc.title Structure-property relationships in polyimide molecular composites en
heal.type journalArticle en
heal.identifier.primary 10.1007/s10019-002-0178-2 en
heal.identifier.secondary http://dx.doi.org/10.1007/s10019-002-0178-2 en
heal.language English en
heal.publicationDate 2002 en
heal.abstract Rigid rod-like polyimide (PIR)/flexible-chain polyimide (PIF) molecular composites, with 20, 40, 50, 60 and 80 wt. % of the rigid component, were prepared and their structure and molecular dynamics were investigated, in relation to those in pure PIR and PIF. SAXS, DSC, DMA, TSDC and laser-interferometric creep rate spectroscopy (CRS) techniques were used for characterization of nanostructure, glass transition and sub-T-g relaxations at temperatures from 100 to 600-650 K. All the experiments indicated pronounced deviations from additivity in both nanostructure and dynamics of molecular composites. Mixing of the PIR and PIF components led in particular to a smaller nanostructure, down to formation of the nano scale-homogeneous composite. Changes of the dynamic characteristics in two opposite directions and arising of large dynamic heterogeneity around T-g were observed as a result of confinement/constraining effects. en
heal.publisher SPRINGER-VERLAG en
heal.journalName MATERIALS RESEARCH INNOVATIONS en
dc.identifier.doi 10.1007/s10019-002-0178-2 en
dc.identifier.isi ISI:000175605700008 en
dc.identifier.volume 5 en
dc.identifier.issue 5 en
dc.identifier.spage 230 en
dc.identifier.epage 237 en


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