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dc.contributor.authorHeidarzadeh, Nina
dc.contributor.authorRafizadeh, Mehdi
dc.contributor.authorFaramarz Afshar Taromi, Faramarz Afshar
dc.contributor.authorPuiggalí Bellalta, Jordi
dc.contributor.authorValle Mendoza, Luis Javier del
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2019-04-03T18:03:42Z
dc.date.issued2018-12-04
dc.identifier.citationHeidarzadeh, N. [et al.]. Nucleating and retarding effects of nanohydroxyapatite on the crystallization of poly(butylene terephthalate-co-alkylene dicarboxylate)s with different lengths. "Journal of thermal analysis and calorimetry", 4 Desembre 2018, vol. 137, núm. 2, p. 421-435.
dc.identifier.issn1388-6150
dc.identifier.urihttp://hdl.handle.net/2117/131233
dc.description.abstractNew biodegradable and biocompatible composites are continuously developed for biomedical applications (e.g., from drug delivery devices to tissue engineering scaffolds). Properties of such systems may depend on their morphology and structure, which are attained after their processing, and therefore, the study of the crystallization kinetics has a particular relevance. The crystallization kinetics of hydroxyapatite-filled poly(butylene terephthalate-co-alkylene dicarboxylate)s has been studied under non-isothermal conditions, using a wide range of cooling rates and different kinetic models. Based on our results, nanohydroxyapatite (nHAp) particles were found to effectively act as additional nucleation sites for poly(butylene terephthalate-co-succinate) (PBST), giving rise to an increased crystallization rate with respect to pure PBST. However, the overall growth rate of HAp nanocomposites decreased compared to the corresponding homopolymers with longer aliphatic dicarboxylic acids (i.e., adipic and sebacic acid derivatives). In order to clarify this point, the activation energy for non-isothermal crystallization was evaluated using the Friedman method and significant differences were observed, suggesting a disturbing effect of nanoparticles on the motion of molecular chains that hindered their capability to reach the growing crystallization front. Isoconversional methods provided a good understanding of the kinetics of the crystallization process and significant information regarding the activation energy, relative crystallinity, and global and local Avrami exponents.
dc.format.extent15 p.
dc.language.isoeng
dc.publisherSpringer
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.lcshPolymers
dc.subject.lcshCrystallization
dc.subject.otherNon-isothermal crystallization
dc.subject.otherIsokinetic and isoconversional method
dc.subject.otherPoly(alkylene dicarboxylate)
dc.subject.otherBiodegradable polymer
dc.subject.otherHydroxyapatite
dc.titleNucleating and retarding effects of nanohydroxyapatite on the crystallization of poly(butylene terephthalate-co-alkylene dicarboxylate)s with different lengths
dc.typeArticle
dc.subject.lemacCristal·lització
dc.subject.lemacPolímers
dc.contributor.groupUniversitat Politècnica de Catalunya. PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables.
dc.identifier.doi10.1007/s10973-018-7953-9
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://link.springer.com/article/10.1007%2Fs10973-018-7953-9
dc.rights.accessRestricted access - publisher's policy
drac.iddocument23566291
dc.description.versionPostprint (published version)
dc.date.lift2019-12-04
upcommons.citation.authorHeidarzadeh, N.; Rafizadeh, M.; Faramarz Afshar Taromi, F.; Puiggali, J.; del Valle, LJ.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameJournal of thermal analysis and calorimetry
upcommons.citation.volume137
upcommons.citation.number2
upcommons.citation.startingPage1
upcommons.citation.startingPage431
upcommons.citation.endingPage15
upcommons.citation.endingPage425


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