Isoconversional kinetic analysis of stoichiometric and off-stoichiometric epoxy-amine cures

The curing reaction of stoichiometric and off-stoichiometric diglycidyl ether of bisphenol A (DGEBA) and 1,3-phenylene diamine ( m-PDA) mixtures was studied by differential scanning calorimetry, thermogravimetric analysis and rheological measurements. In order to highlight the side reactions such as...

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Vydáno v:Thermochimica acta Ročník 447; číslo 2; s. 167 - 177
Hlavní autoři: Sbirrazzuoli, Nicolas, Mititelu-Mija, Alice, Vincent, Luc, Alzina, Camille
Médium: Journal Article
Jazyk:angličtina
Vydáno: Amsterdam Elsevier B.V 15.08.2006
Elsevier Science
Témata:
Applied sciences
Chemical properties
Epoxy cure
Etherification
Exact sciences and technology
Homopolymerization
Isoconversional analysis
Model-free kinetics
Polymer industry, paints, wood
Properties and testing
Rheometry
Technology of polymers
Isoconversional analysis
Homopolymerization
Etherification
Epoxy cure
Model-free kinetics
Rheometry
Stoichiometry
Epoxy resin
Polymerization
Curing(plastics)
Tertiary amine
Kinetics
Rheometer
ISSN:0040-6031, 1872-762X
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Popis
Shrnutí:The curing reaction of stoichiometric and off-stoichiometric diglycidyl ether of bisphenol A (DGEBA) and 1,3-phenylene diamine ( m-PDA) mixtures was studied by differential scanning calorimetry, thermogravimetric analysis and rheological measurements. In order to highlight the side reactions such as etherification and homopolymerization, the neat DGEBA and DGEBA/DMBA ( N, N-dimethylbenzylamine) mixture were examined. The classical model-fitting and the advanced isoconversional methods were used to determine the activation energy of the different reactions. The advanced isoconversional method leads to a good agreement between isothermal, nonisothermal and rheological results. The effective activation energies of primary amine epoxy reaction, etherification and homopolymerization were estimated to about 55–60, 104 and 170 kJ mol −1, respectively.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2006.06.005