ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Spiral structures on lamellar single crystals of polyethylene have been ascribed to screw dislocation. Several photographs are shown which seems to verify the possibility of origination of the screw dislocations due to the collision of two growing single crystals. This mechanism accounts for the following facts often found in these spiral structures. (1) Spiral structures often grow from the intersection of two single crystals. (2) The distances from the center of spirals to the nearest edges of the two crystals are approximately equal to each other. (3) Centers of the spirals are often located on the diagonal of the bottom single crystal on which they grew. (4) Daughter crystals formed on a contour line farther from the center of the mother crystal are smaller.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1962.1205916810
