Abstract
Thin isotactic polystyrene films (∼50 nm thick) have been crystallized from the melt on various substrate materials (carbon, glass, mica, polyimide sheet and silicon). The morphology of the crystals has been examined using atomic force microscopy, and was found to be dependent on the nature of the substrate, with two basic types of crystal forming. Crystals either develop around giant screw dislocations, or around small bundles of lamellae growing perpendicular to the substrate surface. It has further been observed that the number of screw dislocations generated in the lamellae is also dependent on the substrate, as is the growth rate of the spiral terraces. These effects are interpreted in terms of interactions between the molecules in the melt and the substrate surface.
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SUTTON, S.J., IZUMI, K., MIYAJI, H. et al. The morphology of isotactic polystyrene crystals grown in thin films: the effect of substrate material. Journal of Materials Science 32, 5621–5627 (1997). https://doi.org/10.1023/A:1018688827486
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DOI: https://doi.org/10.1023/A:1018688827486