engleski

Permeability characterisation of solvent treated polymer materials

The permeability of gases is reported for some monofilms as well as laminated polymers at temperature from 20 to 60 oC. In order to simulate the effect of food/packaging interaction on permeability of polymeric materials, all investigated samples are subjected into 15 % (v/v) ethanol and 3 % (w/v) acetic acid prior to permeability measurements. The activation energy for permeability is also reported for each gas. The permeability of the selected polymers treated with food simulants increased significantly compared to untreated ones, mainly due to swelling effect of the water molecules. Generally, similar permeability values are obtained for nitrogen and carbon dioxide. All investigated samples showed Arrhenius behaviour, predicted by equation, when in the dry condition.

Acetic acid; Activation energy; Ethanol;Gas permeability; Permeates; Polymers

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