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Autoacceleration and inhibition: Free volume. Epoxy-amine kinetics
Authors:Senen Paz-Abuin  Arturo Lopez-Quintela  Mercedes Pazos Pellin  Montserrat Varela  Pilar Prendes
Abstract:The epoxy-diamine cure process was studied. We found that the mechanism can be described in three steps: (i) initiation up to 20–25% of conversion. (ii) autoacceleration and (iii) inhibition. It has been observed that after the initiation there is a clear autoacceleration effect which has been explained in terms of free volume, considerations: the volume occupied by the products of reaction diminishes the available volume increasing the “local concentration” of the reactants and therefore the rate of reaction. The reaction was followed by FTIR (near infrared) as the main technique. We used a purified epoxy resin as well as phenyl glycidyl ether cured with m-xylenediamine. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 1001–1016, 1998
Keywords:free volume  autoacceleration  inhibition  tertiary amines  friction coefficient
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