The effect of a magnetic tape coating process on the structure and properties of a semi-crystalline polymer |
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| Authors: | R. H. Warbington W. C. Crowe J. C. Seferis A. J. deVries R. Gehrke H. G. Zachmann |
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| Affiliation: | (1) Present address: Polymeric Composites Laboratory, Department of Chemical Engineering, University of Washington, Seattle, Washington, USA;(2) Rhone-Poulenc, Paris, France;(3) Abteilung Angewandte Chemie, Universität Hamburg, Hamburg, F.R.G. |
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| Abstract: | A combination of structure identifying and bulk property experiments were combined with a two-phase analytical methodology to elucidate the influence of a magnetic tape coating process on the substrate polymer film. Employing a typical tape manufacturing process that utilizes coating, drying, and calendering stages, polyethylenete-rephthalate polymer film samples with and without the magnetic coating were prepared.Experiments and modeling studies performed on these samples demonstrate that the drying and calendering processes may increase the crystallinity and noncrystalline orientation of the substrate film. In addition, dynamic mechanical experiments identified a viscoelastic transition at 50 °C for the PET substrate film sample which is near the glass transition of the magnetic coating utilized. Overall, the results of this investigation provide a basis for evaluating structure property interrelations of polymer-based magnetic tapes. |
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| Keywords: | Semi-Crystalline Polymers orientation crystallinity magnetic coating processing |
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