Rheokinetics of crosslinkable poly(vinyl acetate) emulsion and diethylene triamine
作者： J. Lu , A. J. Easteal , D. Bhattacharyya , N. R. Edmonds , C. Bolt
DOI: 10.1002/APP.36934
关键词: Arrhenius plot 、 Materials science 、 Curing (chemistry) 、 Vinyl acetate 、 Polymer chemistry 、 Viscoelasticity 、 Emulsion polymerization 、 Reaction rate constant 、 Rheology 、 Chemical engineering 、 Emulsion
摘要: The study of the rheological behavior associated with crosslinking process epoxy-functionalized poly(vinyl acetate) emulsion and diethylene triamine showed that system was reactive very sensitive to temperature. Gelation times gelation temperatures were determined from abrupt changes viscoelastic material functions G′, G″, η* in time sweeps temperature sweeps. Isothermal kinetics models based on isoconversional method predicted relationship curing rate, degree conversion, reaction nature kinetic parameters, dependence rate constants found be described by Arrhenius relationship. dependencies frequency independent at gel point, Tgel, providing a fingerprint for determining Tgel crosslinkable systems. variation G′ G″ followed power laws showing = A′ωb A″ωc through sweep. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci,
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