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Tetrafunctional epoxy resins: Modeling the curing kinetics based on FTIR spectroscopy data
Author(s) -
Musto Pellegrino,
Martuscelli Ezio,
Ragosta Giuseppe,
Russo Pietro,
Villano Paola
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19991017)74:3<532::aid-app8>3.0.co;2-q
Subject(s) - epoxy , fourier transform infrared spectroscopy , curing (chemistry) , kinetics , materials science , polymer chemistry , composite material , chemical engineering , engineering , physics , quantum mechanics
The curing kinetics of two thermosetting systems based on a tetrafunctional epoxy resin was investigated by Fourier transform infrared spectroscopy. Two formulations were studied, in which the hardener was an aromatic diamine and a carboxylic dianhydride, respectively. The quantitative evaluation of the epoxy conversion was based on spectra collected in the near‐infrared range (8000–4000 cm −1 ) as well as in the medium infrared range (4000–400 cm −1 ). The kinetic parameters evaluated in the above frequency intervals were significantly different. The reasons for such a discrepancy are discussed critically. Several kinetic models, based on the widely employed Kamal approach, were applied to verify their predictive capability. Satisfactory results were obtained for the amine‐cured system, particularly with a modified equation taking into account the autocatalytic nature of the process as well as a limiting diffusional effect. Less accurate results were achieved for the anhydride‐cured system. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 532–540, 1999