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Kinetic study by FTIR, TMA, and DSC of the curing of a mixture of DGEBA resin and γ‐butyrolactone catalyzed by ytterbium triflate
Author(s) -
Ramis Xavier,
Salla Josep Maria,
Mas Cristina,
Mantecón Ana,
Serra Angels
Publication year - 2004
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/app.20061
Subject(s) - curing (chemistry) , trifluoromethanesulfonate , isothermal process , kinetics , fourier transform infrared spectroscopy , polymer chemistry , catalysis , chemistry , bisphenol a , reaction mechanism , materials science , epoxy , chemical engineering , organic chemistry , thermodynamics , physics , quantum mechanics , engineering
A mixture of diglycidylether of bisphenol A (DGEBA) and γ‐butyrolactone (γ‐BL) was cured in the presence of ytterbium triflate as a catalyst. The kinetics of the various elemental processes that occur in the curing process were studied by means of isothermal curing in the FTIR spectrometer. The kinetics of the contraction during the curing was also evaluated by TMA. In both cases, the kinetics was analyzed by means of isoconversional procedure and the kinetic model was determined with the so‐called compensation effect (isokinetic relationship). The isothermal kinetic analysis was compared with that obtained by dynamic curing in DSC. We found that all the reactive processes and the contraction follow a surface‐controlled reaction type of kinetic mechanism, R 3 . © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 381–393, 2004