Formation of calcium crystallites in dry natural rubber particles

dc.creatorRippel, MM
dc.creatorLeite, CAP
dc.creatorLee, LT
dc.creatorGalembeck, F
dc.date2005
dc.dateAUG 15
dc.date2014-11-19T21:03:46Z
dc.date2015-11-26T16:29:37Z
dc.date2014-11-19T21:03:46Z
dc.date2015-11-26T16:29:37Z
dc.date.accessioned2018-03-28T23:10:41Z
dc.date.available2018-03-28T23:10:41Z
dc.identifierJournal Of Colloid And Interface Science. Academic Press Inc Elsevier Science, v. 288, n. 2, n. 449, n. 456, 2005.
dc.identifier0021-9797
dc.identifierWOS:000230037000018
dc.identifier10.1016/j.jcis.2005.03.014
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/67050
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/67050
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/67050
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269771
dc.descriptionIn this paper, the effects of drying and aging of natural rubber particles of Hevea brasiliensis are Studied. The evolutions of the particle morphology and of the elemental distribution are investigated using electron-energy-loss spectroscopy imaging in a low-energy transmission electron microscope (ESI-TEM). It is found that when the sample is aged, calcium salt crystallites are formed around the particles. Fusion of these crystallites with time to form larger crystals shows evidence of ion mobility in the dry rubber matrix. Electron diffraction patterns and elemental mapping analysis indicate the crystals to be calcium sulfate. These crystallites are closely associated with membrane materials of the rubber particle and are surprisingly compatible with the hydrocarbon matrix of the rubber particle. It is proposed that polar sites on the membrane materials provide nucleation sites for the crystallization of calcium and sulfate ions from the latex serum. (c) 2005 Elsevier Inc. All rights reserved.
dc.description288
dc.description2
dc.description449
dc.description456
dc.languageen
dc.publisherAcademic Press Inc Elsevier Science
dc.publisherSan Diego
dc.publisherEUA
dc.relationJournal Of Colloid And Interface Science
dc.relationJ. Colloid Interface Sci.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectnatural rubber particles
dc.subjectcalcium crystallites
dc.subjectelemental mapping
dc.subjectElectron-beam Irradiation
dc.subjectFilm Formation
dc.subjectMicroscopy
dc.subjectLatex
dc.titleFormation of calcium crystallites in dry natural rubber particles
dc.typeArtículos de revistas


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