Cure behavior of epoxy resin/MMT/DETA nanocomposite |
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Authors: | Xu W B Zhou Z F He P S Pan W-P |
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Institution: | (1) Department of Polymer Science and Engineering, Hefei University of Technology Hefei 230009, Anhui, China E-mail;(2) Department of Chemistry, Materials Characterization Center, Western Kentucky University Bowling Green, KY, 42101, USA |
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Abstract: | The Flory's gelation theory, non-equilibrium thermodynamic fluctuation theory and Avrami equation have been used to predict
the gel time t
g and the cure behavior of epoxy resin/organo-montmorillonite/diethylenetriamine intercalated nanocomposites at various temperatures
and organo-montmorillonite loadings. The theoretical prediction is in good agreement with the experimental results obtained
by dynamic torsional vibration method, and the results show that the addition of organo-montmorillonite reduces the gelation
time t
gand increases the rate of curing reaction, the value of k, and half-time of cure after gelation point t1/2 decreases with the increasing of cure temperature, and the value of n is ~2 at the lower temperatures (<60°C) and decreases to ~1.5 as the temperature increases, and the addition of organo-montmorillonite
decreases the apparent activation energy of the cure reaction before gelation point, but has no apparent effect on the apparent
activation energy of the cure reaction after gelation point. There is no special curing process required for the formation
of epoxy resin/organo-montmorillonite/diethylenetriamine intercalated nanocomposite.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | montmorillonite Avrami equation nanocomposite cure diethylenetriamine epoxy resin gel time non-equilibrium thermodynamic fluctuation theory |
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