https://doi.org/10.1351/goldbook.14259
Polycrystalline layer nucleated and shaped by a pre-existing planar surface within or in contact with a polymer melt.
Notes:
- In growth from unoriented melts, as in compression-molding, the transcrystalline layer consists of closely spaced, highly asymmetric spherulites, nucleated on the surface and elongated in the direction normal to the surface of the molded articles.
- In growth from oriented melts, as in injection-molding, two transcrystalline layers may result. The first is the skin layer and is formed by individual lamellae, while the second consists of spherulites. Both grow preferentially in the direction perpendicular to the flow direction and the external surface of the molded articles.
Examples: Crystallization around macroscopic fibers in a polymer-fiber composite or at the surface of injection-molded articles (see also row structure).