ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A permanganic etching technique is used to study the morphology of blow-moulded polyethylene before and after cold-drawing. The morphological changes that occur in the necked region during drawing are also examined. The etching technique reveals an initial unoriented spherulitic structure, only 35% of which is changed on drawing to a fibrillar texture in the form of 30μm diameter columnar entities. Transformation in the necked region is shown to involve (a) trans-spherulitic slip or cleavage, (b) alignment of spherulites into extending rows in the draw direction, (c) destruction of the aligned spherulites to form the columnar entities, which contain plates whose planes are normal to the column axis and hence the draw direction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01203502
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