%0 Journal Article
%T Luminescence spectroscopy applied to a study of the curing process of diglycidyl-ether of bisphenol-A (DGEBA)
%A Sales
%A Rita de C¨¢ssia Mendon£¿a
%A Brunelli
%A Deborah Dibbern
%J Materials Research
%D 2005
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%R 10.1590/S1516-14392005000300013
%X this work involved the application of luminescence spectroscopy under steady-state conditions to study the curing process of the epoxy resin diglycidyl-ether of bisphenol-a (dgeba) using the curing agents 4,4'-diaminodiphenylmethane (ddm) and 4,4'-diaminodiphenylsulfone (dds). two fluorescence methods were employed: the intrinsic method related to the polymeric matrix and the extrinsic method, using the molecular probe 9-anthroic acid (9-aa). stoichiometric mixtures, with and without 9-aa, were heated to 120 ¡ãc at a 5 ¡ãc/min heating rate. these samples were then cured at 120 ¡ãc for a further 2 hours and allowed to cool to room temperature for 20 minutes. the results obtained by the two methods indicate that the cross-linking reaction can be monitored by analyzing the spectral changes of the emission bands of dgeba, curing agents and 9-aa.
%K composites
%K intrinsic luminescence
%K extrinsic luminescence
%K heat treatment.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-14392005000300013&lng=en&nrm=iso&tlng=en