Journal Article10.1016/J.COMPOSITESA.2012.03.016
Characterization of anisotropic moisture absorption in polymeric composites using hindered diffusion model
Landon R. Grace,M.C. Altan +1 more
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TL;DR: In this paper, a method to characterize three-dimensional, anisotropic moisture absorption in polymeric composites using experimental gravimetric absorption data is presented, which is achieved by using the threedimensional hindered diffusion model to recover the moisture absorption properties.
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Abstract: A new method to characterize three-dimensional, anisotropic moisture absorption in polymeric composites using experimental gravimetric absorption data is presented. This is achieved by using the three-dimensional hindered diffusion model to recover the moisture absorption properties of composites which may exhibit Fickian or non-Fickian behavior. Effectiveness of the recovery of absorption properties is assessed using artificially generated experimental data. Anisotropic diffusivities, equilibrium moisture content ( M ∞ ), and molecular binding ( γ ) and unbinding ( β ) probabilities that govern absorption dynamics are recovered by minimizing the difference between model predictions and experimental data. Using artificial moisture absorption data, diffusivities and M ∞ are recovered with less than 1% error, whereas γ and β are recovered with less than 3% error in the non-Fickian diffusion case. Equilibrium moisture content is shown to be accurately determined much earlier by using partial gravimetric data obtained from the initial phases of absorption, even in the presence of considerable measurement error.
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Non-Fickian Moisture Absorption in Vegetable Fiber Reinforced Polymer Composites: The Effect of the Mass Diffusivity.
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Li-Rong Bao,Albert F. Yee +1 more
TL;DR: In this paper, the effect of temperature on moisture absorption and hygrothermal aging in a commercial bismaleimide (BMI) resin and its composites is studied.
239
Water sorption and diffusion studies in an epoxy resin system
C. Maggana,Polycarpos Pissis +1 more
TL;DR: In this article, a two-phase model was proposed for water absorption in epoxide materials, based on the Guggenheim-Anderson-de Boer (GAB) equation, with the assumption that water diffusion can take place independently in different phases of the material in accordance with Fick's second law.
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