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dc.contributor.authorFranco García, María Lourdes
dc.contributor.authorPuiggalí Bellalta, Jordi
dc.contributor.authorRicart López, Albert
dc.contributor.authorMorales Gámez, Laura Teresa
dc.contributor.authorSoto, David
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2011-03-08T10:18:07Z
dc.date.available2011-03-08T10:18:07Z
dc.date.created2009-09-08
dc.date.issued2009-09-08
dc.identifier.citationFranco, M. [et al.]. Synchrotron radiation studies on even-odd and odd-even nylons. "IOP Conference Series: Materials Science and Engineering", 08 Setembre 2009, vol. 14, p. 1-7.
dc.identifier.issn1757-8981
dc.identifier.urihttp://hdl.handle.net/2117/11703
dc.description.abstractAliphatic polyamides derived from odd diamine or odd dicarboxylic acid units cannot adopt a conventional sheet structure when molecular chains have an all trans conformation. However, typical fiber diffraction patterns of this sheet structure were observed in several polyamides derived from odd units such as nylons 65 and 56. Consequently, a new structure based on the establishment of intermolecular hydrogen bonds along two different directions was postulated. Real-time temperature dependence of X-ray diffraction patterns for nylons 65 and 56 was studied by synchrotron radiation to gain understanding of the Brill transition usually occurring in polyamides. Significant differences were found between the temperature dependence of both nylons, although a transition towards a monoclinic structure characterized by a single equatorial reflection around 0.425-0.420 nm was observed to occur at high temperatures. This transition was reversible for nylon 65 only. In this case, a characteristic hysteresis effect was found.
dc.format.extent7 p.
dc.language.isoeng
dc.publisherIOP PUBLISHING LTD.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshSynchrotron radiation
dc.subject.lcshPolymers
dc.titleSynchrotron radiation studies on even-odd and odd-even nylons
dc.typeArticle
dc.subject.lemacSincrotrons
dc.subject.lemacRadiació
dc.subject.lemacPolímers
dc.contributor.groupUniversitat Politècnica de Catalunya. PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables
dc.identifier.doi10.1088/1757-899X/14/1/012006
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
local.identifier.drac5000267
dc.description.versionPostprint (published version)
local.citation.authorFranco, M.; Puiggalí, J.; Ricart, A.; Morales, L.; Soto, D.
local.citation.publicationNameIOP Conference Series: Materials Science and Engineering
local.citation.volume14
local.citation.startingPage1
local.citation.endingPage7


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