Effect of moisture on the viscoelastic properties of an epoxy-clay nanocomposite |
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Authors: | K K Aniskevich T I Glaskova A N Aniskevich Ye A Faitelson |
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Institution: | 1.Institute of Polymer Mechanics,University of Latvia,Riga,Latvia |
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Abstract: | The results of a complex study on the viscoelastic behavior of an epoxy-clay nanocomposite after a long-term exposure to moisture
are presented. The main laws of variation in the glass-transition temperature of the nanocomposite in relation to the different
content of filler and absorbed moisture were determined by using a thermomechanical analysis. The loading levels in creep
experiments were chosen according to the results of quasi-static tensile tests. The sets of creep and creep recovery curves
obtained were approximated by the Boltzmann–Volterra linear integral equation with account of the principle of moisture-time
analogy. The variation in the spectrum of retardation time of the epoxy resin with introduction of the nanofiller was estimated.
It is shown that the moisture-time reduction function correlates with changes in the forced rubber-like elasticity and the
volume of nanocomposite specimens upon their moistening. |
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