Thermal behavior of the highly luminescent poly(3-hydroxybutyrate):Eu(tta)(3)(H2O)(2) red-emissive complex

Autor(es)

Parra, D. F. ^{[1, 2]} ; Forster, P. L. ^{[2, 1]} ; Lyszczek, R. ^[3] ; Ostasz, A. ^[3] ; Lugao, A. B. ^{[2, 1]} ; Rzaczynska, Z. ^[3]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, BR-05508000 Sao Paulo - Brazil

^[2] Natl Nucl Energy Commiss, Chem & Environm Ctr, Energy & Nucl Res Inst, BR-05508000 Sao Paulo - Brazil

^[3] Marie Curie Sklodowska Univ, Dept Gen & Coordinat Chem, Fac Chem, PL-20031 Lublin - Poland

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 114, n. 3, p. 1049-1056, DEC 2013.
• Citações Web of Science: 11

Resumo

The aim of this study has been to gain a fundamental understanding of the mechanisms governing thermal degradation of luminescent poly(3-hydroxybutyrate) (PHB). PHB was doped with diaquatris(thenoyltrifluoroacetonate) europium(III) complex, {[}Eu(tta)(3)(H2O)(2)], and different luminescent systems were obtained. The thermal-stability of the luminescent films was discussed and the products of decomposition were analyzed. Thermal degradation of PHB:Eu(tta)(3) x % systems (x = 0, 1, 5, 10, and 15 %) was elucidated by means of thermogravimetric analysis (TG), the thermal-stability decreases with the increase of europium complex concentration. The PHB polymer decomposed with evolution of carbon dioxide and 2-butenoic acid molecules. The TG-FTIR results, of the gaseous degradation products of PHB in nitrogen atmosphere, indicated that the polymer is stable at temperatures up to 200 A degrees C. Polymer matrix at concentrations above 5 % decomposed with evolution of water molecules among the other gaseous products, which implied the presence of a hydrated complex in the system. The luminescent films showed more flexibility due to a loss in crystallinity, which suggested a potential usefulness in technical applications. (AU)

• Processo FAPESP: 12/00236-1 - Estudo e síntese de marcadores ópticos a partir de terras raras e aplicações em processamento de polímeros
• Beneficiário: Duclerc Fernandes Parra
• Linha de fomento: Auxílio à Pesquisa - Regular