Abstract
In most plastic articles accidental orientation occurs due to the fact that they are usually made from the melt. During the flow and deformation of the melt in extrusion dies and in moulds the material is sheared, with molecular orientation in the shear direction. Part of this orientation relaxes before the material is cooled below the apparent second-order transition point or melting point. Another part, however, remains and is still observable in the final product.
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Schuur, G., Van Der Vegt, A.K. (1975). Orientation of Films and Fibrillation. In: Ward, I.M. (eds) Structure and Properties of Oriented Polymers. Materials Science Series. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9803-8_12
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DOI: https://doi.org/10.1007/978-94-010-9803-8_12
Publisher Name: Springer, Dordrecht
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