부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.tca.2006.06.005 Byline: Nicolas Sbirrazzuoli, Alice Mititelu-Mija, Luc Vincent, Camille Alzina Keywords: Epoxy cure; Etherification; Homopolymerization; Isoconversional analysis; Model-free kinetics; Rheometry Abstract: 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 170kJmol.sup.-1, respectively. Author Affiliation: Thermokinetic Group, Laboratory of Chemistry of Organic and Metallic Materials C.M.O.M., Institute of Chemistry of Nice, University of Nice, Sophia Antipolis, 06108 Nice Cedex 2, France Article History: Received 7 April 2006; Revised 29 May 2006; Accepted 9 June 2006