Layer double hydroxides for enhanced poly(3-hydroxybutyrate-co-3-hydroxyvalerate) crystallization

dc.creatorDagnon, KL
dc.creatorRobinson, C
dc.creatorChen, HH
dc.creatorGarrett, DC
dc.creatorInnocentini-Mei, LH
dc.creatorD'Souza, NA
dc.date2013
dc.date38412
dc.date2014-08-01T18:33:30Z
dc.date2015-11-26T17:05:29Z
dc.date2014-08-01T18:33:30Z
dc.date2015-11-26T17:05:29Z
dc.date.accessioned2018-03-28T23:53:51Z
dc.date.available2018-03-28T23:53:51Z
dc.identifierJournal Of Applied Polymer Science. Wiley-blackwell, v. 127, n. 5, n. 3395, n. 3406, 2013.
dc.identifier0021-8995
dc.identifierWOS:000312936400015
dc.identifier10.1002/app.37646
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/80758
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/80758
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279600
dc.descriptionEnabling the widespread utilization of poly[(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) is strongly associated with enhancing its crystallization kinetics. In this article, we utilize a highly surface active (one reactive group per nanometer square) anion exchanged layered-double hydroxide (LDH) functionalized by stearic acid to probe the crystallization kinetics of PHBV. Our prior work has shown that the addition of LDH decreases the cold crystallization and induces a melt recrystallization peak in PHBV. Since the melt-recrystallization temperature shifted to higher temperature and its corresponding enthalpy increased with increasing LDH loading, this article is focused on understanding the effect of LDH on kinetics and energetics of PHBV crystallization. Both Avrami and LauritzenHoffman modeling are utilized to develop a comprehensive understanding of thermal history effects through differential scanning calorimetry and polarized optical microscopy measurements. Five concentrations by weight of LDH are used: 1, 3, 5, and 7%. The results show that the addition of LDH promoted both primary and secondary nucleation at low concentrations but additional LDH resulted in primary nucleation alone. The crystallization rate and activation energy show a significant increase, which is accompanied by a decrease in the nucleation constant, the surface energy and the work of chain folding for PHBV crystallization. (c) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2013
dc.description127
dc.description5
dc.description3395
dc.description3406
dc.languageen
dc.publisherWiley-blackwell
dc.publisherHoboken
dc.publisherEUA
dc.relationJournal Of Applied Polymer Science
dc.relationJ. Appl. Polym. Sci.
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectPHBV
dc.subjectlayered-double hydroxides
dc.subjectcrystallization kinetics
dc.subjectnanocomposites
dc.subjectThermal-properties
dc.subjectNucleating-agents
dc.subjectBacterial Polyhydroxyalkanoates
dc.subjectIsothermal Crystallization
dc.subjectGrowth-rate
dc.subjectNanocomposites
dc.subjectBehavior
dc.subjectDegradation
dc.subjectMorphology
dc.subjectPolymers
dc.titleLayer double hydroxides for enhanced poly(3-hydroxybutyrate-co-3-hydroxyvalerate) crystallization
dc.typeArtículos de revistas


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