Authors:
Lisardo Núñez Universidade de Santiago de Compostela Campus Sur 15782 Santiago Spain Campus Sur 15782 Santiago Spain

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M. Villaneuva Universidade de Santiago de Compostela Campus Sur 15782 Santiago Spain Campus Sur 15782 Santiago Spain

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B Rial Universidade de Santiago de Compostela Campus Sur 15782 Santiago Spain Campus Sur 15782 Santiago Spain

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M. Núñez Universidade de Santiago de Compostela Departamento de Física Aplicada Campus Sur 15782 Santiago Spain Campus Sur 15782 Santiago Spain

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L. Fraga Universidade de Santiago de Compostela Departamento de Física Aplicada Campus Sur 15782 Santiago Spain Campus Sur 15782 Santiago Spain

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Abstract  

The thermal degradation of the epoxy system diglycidyl ether of bisphenol A (BADGE n=0)/1,2-diamine cyclohexane (DCH) containing different concentrations of an epoxy reactive diluent was studied by thermogravimetric analysis in order to determine the reaction mechanism of the degradation process and to compare it with the results for the same system without diluent. The value of the activation energy, necessary for this study, was calculated using various integral and differential methods. Values obtained using the different methods were compared to the value obtained by the Flynn-Wall-Ozawa"s method (between 193-240 kJ mol-1 depending on the diluent concentration) with does not require a knowledge of the nth order reaction mechanism. All the experimental results were compared to master curves in the range of Doyle"s approximation (20-35% of conversion). Analysis of the results suggests that the reaction mechanism could be F2, F3, or A2 type.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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