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 Transparent and highly oriented samples of high dimensional stability were obtained by extruding crystallised linear polyethylene through a tapered die at temperatures higher than 80° C and below the melting point. The crystal orientation of the extrudate was examined by X-ray techniques, and it was found that there was a preferential a-axes orientation parallel to the radial direction of the rod-shaped extrudate. Electron micrographs of the fractured surface of the extrudate revealed closely packed thin fibrils of diameters of about 300 Å. Small angle X-ray scattering showed a long period of 200 to 300 Å along the longitudinal direction of fibrils, depending on the extruding conditions. This fact suggests the existence of the lamellar structure in the fibrils.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00550308
Permalink