Barrier Properties of Polyamide 12 Films Nucleated with Talc
In this study the influence of talc on the permeability of polyamide 12 films was investigated. Samples were prepared by injection molding of plates and subsequent compression molding. DSC measurements and optical microscopy were used to determine influences of the additive on the degree of crystallinity and spherulite size. The permeation of oxygen, carbon dioxide and water vapor was measured and relationships between morphology and barrier properties of neat and talcnucleated PA12 films were evaluated. A finer and more homogeneous spherulite structure was achieved when talc was added. Even though talc did not increase the degree of crystallinity, a remarkable improvement of barrier properties of up to 50 % was achieved.
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