Artigo de Periódico
Evaluation of thermal stability of quinones by thermal analysis techniques
Fecha
2012Registro en:
0040-6031
v. 529, n. 10
Autor
Sousa, Eliane Teixeira
Silva, Mateus Melo da
Andrade, Sandro José de
Cardoso, Manuela Pedra
Silva, Luciana Almeida
Andrade, Jailson Bittencourt de
Sousa, Eliane Teixeira
Silva, Mateus Melo da
Andrade, Sandro José de
Cardoso, Manuela Pedra
Silva, Luciana Almeida
Andrade, Jailson Bittencourt de
Institución
Resumen
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.