Polímeros (Jun 2006)

Characterization of the curing agents used in epoxy resins with TG/FT-IR technique

  • Benedita M. V. Romão,
  • Milton F. Diniz,
  • Margarete F. P. Azevedo,
  • Vera L. Lourenço,
  • Luiz C. Pardini,
  • Rita C.L. Dutra,
  • Fabrice Burel

DOI
https://doi.org/10.1590/S0104-14282006000200007
Journal volume & issue
Vol. 16, no. 2
pp. 94 – 98

Abstract

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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.

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