Structure-property relationships in polyimide molecular composites

Bershtein, VA; David, L; Egorova, LM; Kanapitsas, A; Meszaros, O; Pissis, P; Sysel, P; Yakushev, PN

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