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Etherification versus amine addition during epoxy resin/amine cure: An in situ study using near‐infrared spectroscopy
Author(s) -
Xu Lisheng,
Schlup John R.
Publication year - 1998
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(19980131)67:5<895::aid-app15>3.0.co;2-n
Subject(s) - amine gas treating , epoxide , reaction rate constant , epoxy , infrared spectroscopy , catalysis , polymer chemistry , chemistry , arrhenius equation , tertiary amine , reaction rate , photochemistry , materials science , kinetics , organic chemistry , activation energy , physics , quantum mechanics
The reactions between a multifunctional epoxy resin, tetraglycidyl 4,4′‐diaminodiphenylmethane (TGDDM) and a monofunctional amine, methylaniline (mAnil) are studied. Due to the existence of a tertiary amine catalytic center within the TGDDM molecule, the etherification reaction during cure of TGDDM is usually more significant than in other epoxide systems. The importance of this reaction relative to the amine addition reactions is investigated. In situ near‐infrared spectroscopy is used to obtain kinetic data during the cure reactions. The reaction rate constants are calculated from linear regression analysis for both amine addition and etherification reactions based on the reaction mechanisms proposed. Arrhenius relationships are observed for all the reaction rate constants involved. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:895–901, 1998