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dc.contributor.authorHeidarzadeh, Nina
dc.contributor.authorMehdi Rafizadeh, Mehdi
dc.contributor.authorFaramarz Afshar Taromi, Faramarz Afshar
dc.contributor.authorValle Mendoza, Luis Javier del
dc.contributor.authorFranco García, María Lourdes
dc.contributor.authorPuiggalí Bellalta, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2017-03-22T11:21:17Z
dc.date.available2017-03-22T11:21:17Z
dc.date.issued2016-07-06
dc.identifier.citationHeidarzadeh, N., Mehdi Rafizadeh, M., Faramarz Afshar Taromi, F., del Valle, LJ., Franco, M., Puiggali, J. Effect of hydroxyapatite nanoparticles on the degradability of random poly(butylene terephthalate-co-aliphatic dicarboxylate)s having a high content of terephthalic units. "Polymers", 6 Juliol 2016, vol. 8, núm. 7.
dc.identifier.issn2073-4360
dc.identifier.urihttp://hdl.handle.net/2117/102784
dc.description.abstractCopolyesters derived from 1,4-butanediol and constituted also of aliphatic and aromatic dicarboxylate units in a molar ratio of 3:7 were synthesized by a two-step polycondensation procedure. Succinic, adipic, and sebacic acids were specifically selected as the aliphatic component whereas terephthalic acid was chosen as the aromatic moiety. The second synthesis step was a thermal transesterification between the corresponding homopolymers, always attaining a random distribution as verified by NMR spectroscopy. Hybrid polymer composites containing 2.5 wt % of hydroxyapatite (HAp) were also prepared by in situ polymerization. Hydroxyl groups on the nanoparticle surface allowed the grafting of polymer chains in such a way that composites were mostly insoluble in the typical solvents of the parent copolyesters. HAp had some influence on crystallization from the melt, thermal stability, and mechanical properties. HAp also improved the biocompatibility of samples due to the presence of Ca2+ cations and the damping effect of phosphate groups. Interestingly, HAp resulted in a significant increase in the hydrophilicity of samples, which considerably affected both enzymatic and hydrolytic degradability. Slight differences were also found in the function of the dicarboxylic component, as the lowest degradation rates was found for the sample constituted of the most hydrophobic sebacic acid units. View Full-Text
dc.language.isoeng
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.lcshHydroxyapatite
dc.subject.lcshCopolymers
dc.subject.lcshPolyesters
dc.subject.lcshNanocomposites (Materials)
dc.subject.otherpoly(butylene terephthalate)
dc.subject.othercopolyesters
dc.subject.otherhydroxyapatite
dc.subject.othernanocomposites
dc.subject.otherbiocompatibility
dc.subject.otherhydrolytic degradation
dc.subject.otherenzymatic degradation
dc.titleEffect of hydroxyapatite nanoparticles on the degradability of random poly(butylene terephthalate-co-aliphatic dicarboxylate)s having a high content of terephthalic units
dc.typeArticle
dc.subject.lemacHidroxiapatita
dc.subject.lemacCopolímers
dc.subject.lemacPolièsters
dc.contributor.groupUniversitat Politècnica de Catalunya. PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables
dc.identifier.doi10.3390/polym8070253
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
local.identifier.drac19743763
dc.description.versionPostprint (published version)
local.citation.authorHeidarzadeh, N.; Mehdi Rafizadeh, M.; Faramarz Afshar Taromi, F.; del Valle, LJ.; Franco, M.; Puiggali, J.
local.citation.publicationNamePolymers
local.citation.volume8
local.citation.number7
local.citation.startingPage253


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