The influence of ?-ray irradiation on the thermal stability and molecular weight of Poly(L-Lactic acid) and its nanocomposites

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dc.authoridOral, Ayhan/0000-0003-4965-8754
dc.authoridYildirim, Yeliz/0000-0002-3014-4510
dc.contributor.authorYildirim, Yeliz
dc.contributor.authorOral, Ayhan
dc.date.accessioned2025-01-27T20:52:08Z
dc.date.available2025-01-27T20:52:08Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe gamma (gamma) radiation effects on the thermal properties of Poly(L-Lactic acid) (PLLA), and three PLLA nanocomposites containing 1, 3 and 5% montmorillonite MK10 clay were investigated in different solvents such as tetrahydrofuran, chloroform and 1,4 dioxane. The polymers were irradiated by gamma radiation at low absorbed doses of 1, 5, and 10 kGy. The thermal properties and molecular weight of the unirradiated and irradiated PLLA and its nanocomposites were characterized by Thermogravimetry (TG) and Gel Permeation Chromatography (GPC), respectively. The TG curves showed that the thermal degradation of the unirradiated PLLA and its nanocomposites occurred in only one stage. The activation energies of thermal degradation (E) for irradiated and unirradiated PLLA and its nanocomposites were determined by the Flynn-Wall-Ozawa (FWO) method. The E values of the polymer irradiated with gamma radiation seem to be smaller than those of unirradiated sample due to polymer bond scission. In addition, the calculated G values of the polymer and nanocomposites showed that the polymer structure was less stable when exposed to radiation with increasing % MK10 content. (C) 2013 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.radphyschem.2013.08.016
dc.identifier.endpage74
dc.identifier.issn0969-806X
dc.identifier.scopus2-s2.0-84884576097
dc.identifier.scopusqualityQ1
dc.identifier.startpage69
dc.identifier.urihttps://doi.org/10.1016/j.radphyschem.2013.08.016
dc.identifier.urihttps://hdl.handle.net/20.500.12428/25674
dc.identifier.volume96
dc.identifier.wosWOS:000330157400011
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofRadiation Physics and Chemistry
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectPoly(L-Lactic acid)
dc.subjectGamma radiation
dc.subjectThermal degradation
dc.subjectNanocomposite
dc.titleThe influence of ?-ray irradiation on the thermal stability and molecular weight of Poly(L-Lactic acid) and its nanocomposites
dc.typeArticle

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