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Thermal and electrical behavior of hybrid thermosets based on epoxy and maleimide resins cured with p ‐aminobenzoic acid
Author(s) -
Mustata Fanica,
Tudorachi Nita,
Asandulesa Mihai,
Bicu Ioan
Publication year - 2019
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.21310
Subject(s) - thermogravimetric analysis , diglycidyl ether , thermosetting polymer , epoxy , chemistry , thermal decomposition , maleimide , activation energy , polymer chemistry , differential scanning calorimetry , glass transition , dynamic mechanical analysis , thermal analysis , fourier transform infrared spectroscopy , bisphenol a , chemical engineering , organic chemistry , polymer , thermal , thermodynamics , physics , engineering
Two thermoset systems based on maleimides and diglycidyl ether of bisphenol A (DGEBA) cured with p ‐aminobenzoic acid were characterized in terms of thermal and electrical behavior. Thermal characterization has been undertaken by means of thermogravimetric analysis in nitrogen atmosphere up to 600°C using simultaneous thermogravimetric/Fourier transform infrared/mass spectrometry (TG/FT‐IR/MS) analysis. In the first stage of thermal degradation, the global kinetic parameters [activation energy ( E a ) and preexponential factor (log A 1 (s −1 ))] were calculated using the isoconversional method of Friedman. The energies variation as well as the shape of the differential thermal analysis curves suggests that the thermal decomposition process occurred in multiple stages. The evolved gases analysis was conducted by simultaneous TG/FT‐IR/MS coupled techniques. Dielectric relaxation spectroscopy characterization was also made.