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Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

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ROMAO, Benedita M. V. et al. Characterization of the curing agents used in epoxy resins with TG/FT-IR technique. Polímeros [online]. 2006, vol.16, n.2, pp.94-98. ISSN 1678-5169.  http://dx.doi.org/10.1590/S0104-14282006000200007.

Samples of epoxy resin (EP) based on the diglycidyl ether of bisphenol A (DGEBA), cured with nadic methyl anhydride (NMA) and mercaptan (CAPCURE 3-800), or amine-phenol (CAPCURE EH-30), respectively, SE 4 and SE 5, were prepared in the stoichiometric ratio determined by the supplier. The curing behaviour of the epoxy systems SE 4 and SE 5 was followed by DSC (Differential Scanning Calorimetry). These SE and their ingredients were analyzed using FTIR transmission techniques (KBr pellets, pyrolysis without control and controlled pyrolysis-FT-IR, the CONTROLPIR/FT-IR) for characterizing the curing agents (CA). The temperature range used for samples pyrolysis was found from TG (thermogravimetry). Thus, the FT-IR bands of liquid pyrolysate obtained by CONTROLPIR/FT-IR were evaluated, in comparison to the reference spectrum of CA. The characterization of CA was also possible, by the analysis of such SE with the TG/FT-IR technique.

Palavras-chave : Epoxy resins; curing agents; TG/FT-IR technique; controlled pyrolysis-FT-IR.

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