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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/15691

Title: Evaluation of thermal stability of quinones by thermal analysis techniques
Other Titles: Thermochimica Acta
Authors: Sousa, Eliane Teixeira
Silva, Mateus Melo da
Andrade, Sandro José de
Cardoso, Manuela Pedra
Silva, Luciana Almeida
Andrade, Jailson Bittencourt de
Keywords: Quinones;Thermal behavior;Thermal stability;TG;DSC
Issue Date: 2012
Abstract: The thermal behavior of quinones, such as 1,4-benzoquinone; 1,2-naphthoquinone; 1,4-naphthoquinone; 9,10-phenanthraquinone and 9,10-anthraquinone, was evaluated by simultaneous thermogravimetry (TG) and differential scanning calorimetry (DSC). Headspace analysis in GC–MS in different temperatures previously identified by TG and DSC was also performed and provided information about thermal behavior of quinones and their degradation products. Results showed that 1,4-benzoquinone, 1,4-naphthoquinone and 9,10-anthraquinone are thermally stable over the range of the temperature evaluated, while 1,2-naphtoquinone and 9,10-phenanthraquinone decompose above 100 °C and 215 °C, respectively. Overall, results indicate that the molecular structure influences strongly the course of the thermal decomposition of these quinones and it is a determining factor for its thermal stability.
Description: Texto completo: acesso restrito. p. 1-5
URI: http://repositorio.ufba.br/ri/handle/ri/15691
ISSN: 0040-6031
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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