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  3. DQI - Departamento de Química (São Cristóvão)
  4. DQI - Trabalhos apresentados em eventos
Please use this identifier to cite or link to this item: https://ri.ufs.br/jspui/handle/riufs/21406
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dc.contributor.authorCosta, Silvânio Silvério Lopes da-
dc.contributor.authorSantos, Marcelo Leite dos-
dc.contributor.authorBeltrão, Marcelo Augusto Neves-
dc.contributor.authorMatos, Charlene Regina Santos-
dc.contributor.authorAlcântara, Ana Clécia Santos de-
dc.contributor.authorGimenez, Iara de Fatima-
dc.contributor.authorAlves, Oswaldo Luiz-
dc.contributor.authorBarreto, Ledjane Silva-
dc.date.accessioned2025-03-21T11:42:07Z-
dc.date.available2025-03-21T11:42:07Z-
dc.date.issued2010-
dc.identifier.citationCOSTA, S. S. L. et al. Effect of PET on the crystallization of lithium/sodium acetate glasses studied by isothermal and non-isothermal kinetic methods. Journal of Physics: Conference Series, v. 249, 2010. Trabalho apresentado no 16º International Conference on Defects in Insulating Materials, 2008, [Aracaju]. Disponível em: https://iopscience.iop.org/article/10.1088/1742-6596/249/1/012050/pdf. Acesso em: 21 mar. 2025.pt_BR
dc.identifier.issn1742-6596-
dc.identifier.issn1742-6588-
dc.identifier.urihttps://ri.ufs.br/jspui/handle/riufs/21406-
dc.languageengpt_BR
dc.publisherIOP Publishingpt_BR
dc.relation.ispartofJournal of Physics: Conference Seriespt_BR
dc.subjectPETeng
dc.subjectCrystallizationeng
dc.subjectLithium acetateeng
dc.subjectSodium acetateeng
dc.titleEffect of PET on the crystallization of lithium/sodium acetate glasses studied by isothermal and non-isothermal kinetic methodspt_BR
dc.typeTrabalhos em Eventospt_BR
dc.identifier.licenseCreative Commons Atribuição 4.0 Internacional (CC BY 4.0)pt_BR
dc.description.resumoThe kinetic parameters for the crystallization of CH3COOLi/CH3COONa glasses varying the Li:Na mole fraction LN21(2:1), LN31(3:1), LN41(4:1) and LN32(3:2) have been evaluated by isothermal and non-isothermal DSC measurements. Crystallization of LN21 samples containing variable amounts of poly(ethylene-terephthalate) (PET) has also been studied. Values of the Avrami exponent n varying between 2.05 and 2.33 were obtained from both isothermal and non-isothermal methods for all LN glasses, indicating a diffusioncontrolled crystal growth with a decreasing nucleation rate. The more pronounced effect of PET on glass crystallization has been observed for low polymer amounts, being interpreted as due to polymer miscibility with the glass, which is absent for high PET amounts. The value of n = 4.75 for LN21+PET (3%) suggests a change in the crystallization mechanism from diffusion-controlled to interface-controlled crystal growth. The apparent activation energy (E) decreased with increasing PET amount, evidencing an improvement in glass stability against crystallization.pt_BR
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DQI - Trabalhos apresentados em eventos

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