The main intent of this work was to assess the effect of various operating conditions on the oxygen transport and moisture sorption in composites obtained via melt compounding of Nylon-6 and a modified montmorillonite, with variable weight fractions of inorganic phase,. The experiments were carried on using two different manometric devices for the measurement of oxygen permeation and water vapor sorption; and the temperature was varied from 25 to 65°C. The oxygen permeability data were analysed through semi-empirical models for gas permeability in composite materials. In order to investigate the effect of film orientation on the transport properties, we examined films characterized by two values of draw ratio (DR=7 and 11). At each temperature, the oxygen permeability decreases with the amount of filler added. In moisture sorption tests we did not notice any remarkable dependence of water solubility on the mass fraction of filler, while the diffusivity of both oxygen and water vapor decreases with the filler fraction
Moisture sorption and oxygen transport in a Nylon-6 / montmorillonite composite
PIZZI, DIEGO;DE ANGELIS, MARIA GRAZIA;DOGHIERI, FERRUCCIO;GIACINTI BASCHETTI, MARCO;SARTI, GIULIO CESARE
2005
Abstract
The main intent of this work was to assess the effect of various operating conditions on the oxygen transport and moisture sorption in composites obtained via melt compounding of Nylon-6 and a modified montmorillonite, with variable weight fractions of inorganic phase,. The experiments were carried on using two different manometric devices for the measurement of oxygen permeation and water vapor sorption; and the temperature was varied from 25 to 65°C. The oxygen permeability data were analysed through semi-empirical models for gas permeability in composite materials. In order to investigate the effect of film orientation on the transport properties, we examined films characterized by two values of draw ratio (DR=7 and 11). At each temperature, the oxygen permeability decreases with the amount of filler added. In moisture sorption tests we did not notice any remarkable dependence of water solubility on the mass fraction of filler, while the diffusivity of both oxygen and water vapor decreases with the filler fractionI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
