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Abstract
The barrier properties of chitosan and cross-linked chitosan films with respect to water vapour at three water activities, oxygen transmission rates and grease resistance values have been determined. Other properties evaluated include tensile strength, tear resistance and burst strength. In general, the cross-linked chitosan films possessed greater permeabilities and lesser values for mechanical properties. The water vapour permeabilities were found to be influenced by water activity, obeying non-Fickian behaviour characteristic of hydrophilic polymers.
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