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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluation of Postpolymerization as a Function of the Storage Time of Triethylene Glycol Dimethacrylate/2,2-Bis[4-(2-Hydroxy-3-Methacryloxy-Prop-1-Oxy)-Phenyl] -propane Bisphenyl-alpha-Glycidyl Ether Dimethacrylate Copolymers Used in Dental Resins by Differential Scanning Calorimetry and Dynamic Mechanical Analysis

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Autor(es):
Rigoli, Isabel C. [1] ; Cavalheiro, Carla C. S. [1] ; Neumann, Miguel G. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Applied Polymer Science; v. 112, n. 2, p. 679-684, APR 15 2009.
Citações Web of Science: 3
Resumo

The aim of this work was to evaluate the effect of the storage time on the thermal properties of triethylene glycol dimethacrylate/2,2-bis{[}4-(2-hydroxy-3-methacryloxy-prop-1-oxy)-phenyl] propane bisphenyl-alpha-glycidyl ether dimethacrylate (TB) copolymers used in formulations of dental resins after photopolymerization. The TB copolymers were prepared by photopolymerization with an Ultrablue IS light-emitting diode, stored in the dark for 160 days at 37 degrees C, and characterized with differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and Fourier transform infrared spectroscopy with attenuated total reflection. DSC curves indicated the presence of an exothermic peak, confirming that the reaction was not completed during the photopolymerization process. This exothermic peak became smaller as a function of the storage time and was shifted at higher temperatures. In DMA studies, a plot of the loss tangent versus the temperature initially showed the presence of two well-defined peaks. The presence of both peaks confirmed the presence of residual monomers that were not converted during the photopolymerization process. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 679-684, 2009 (AU)

Processo FAPESP: 02/03448-8 - Estudos termoanalíticos de biopolímeros, ditiocarbamatos e derivados de ácidos graxos
Beneficiário:Éder Tadeu Gomes Cavalheiro
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 05/01618-1 - Caracterização de polímeros odontológicos fotocurados com diferentes fotoiniciadores e fontes de luz
Beneficiário:Isabel Cristina Rigoli
Linha de fomento: Bolsas no Brasil - Pós-Doutorado