Abstract
Water absorption in particulate composites at ambient temperature influences their thermomechanical properties. Second Fick's law of diffusion was used in this paper to predict the diffusion coefficient of the composite materials tested. In all cases the matrix material was a diglycidyl ether of bisphenol-A polymer cured with 8 phr triethylene tetramine and filled with iron particles with an average diameter 150 μm at five distinct volume fractionsv f =0, 0.05, 0.10, 0.16 and 0.20. The modification of the modulus of elasticity, ultimate stress, breaking strain and breaking energy due to moisture absorption was examined. Moreover, differential scanning calorimetry was used to study the influence of the time exposure into water and the filler concentration of the particulates on their glass transition temperature. Finally, the void occupancy in the composite was evaluated from free volume considerations.
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Theocaris, P.S., Kontou, E.A. & Papanicolaou, G.C. The effect of moisture absorption on the thermomechanical properties of particulates. Colloid & Polymer Sci 261, 394–403 (1983). https://doi.org/10.1007/BF01418212
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DOI: https://doi.org/10.1007/BF01418212