Change of spherulitic structure in melt‐crystallized polymer fibers and films during uniaxial stretching

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Abstract
As revealed by electron‐microscopic studies, the morphology of melt‐crystallized polymer films and fibers subjected to the ultimate degree of orientation, is characterized by layer‐like organization of lamellar crystals (paracrystalline structure). If the direction of the long axes of the macromolecules in crystallites coincides with the texture axis, the morphological orientation of paracrystalline layers is orthogonal to the stretching direction. Partial transformation of a spherulite into a “microneck” can lead to flattening of spherulites.

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