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http://dx.doi.org/10.3795/KSME-A.2012.36.11.1297

Evaluation of Moisture Sorption Characteristics in Polymer Material  

Park, Hee-Jin (Corporate R&D Institute, Samsung Electro-Mechanics Co., Ltd.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.11, 2012 , pp. 1297-1303 More about this Journal
Abstract
In this paper, the standard procedures for measuring the moisture sorption properties of thin polymeric materials such as polyethylene terephthalate (PET) by using the thermo-gravimetric method to characterize the moisture diffusion in the polymer are presented, and the sorption properties are quantified. The moisture diffusivity and solubility are characterized to investigate the effect of temperature and humidity on the moisture sorption properties according to the Arrhenius equation. The validation of the obtained sorption properties using thermogravimetry is discussed with the measured permeability based on Fickian diffusion. The nonlinear behavior of the concentration dependent moisture diffusion is investigated experimentally, and the nonlinearity is characterized numerically for the case of having an interface with an inorganic material such as a metal. The Fickian/Non-Fickian model based on the obtained moisture sorption properties is compared and discussed.
Keywords
Concentration; Diffusivity; Permeability; Reliability; Polymer; Solubility; Moisture Sorption; WVTR;
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