The development of crystallinity and transparency in irradiated polyethylene
Article first published online: 9 MAR 2003
Copyright © 1961 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 5, Issue 16, pages 408–423, July/August 1961
How to Cite
Levy, B. (1961), The development of crystallinity and transparency in irradiated polyethylene. J. Appl. Polym. Sci., 5: 408–423. doi: 10.1002/app.1961.070051606
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Received: 23 SEP 1960
A procedure has been developed for producing highly transparent polyethylene by use of high-energy electron irradiation above the melting point. The polyethylene retains about 60% of its original tensile strength after receiving the optimum irradiation dose of 50 Mrad at room temperature followed by 50 Mrad at 150°C. The transparency of a 0.02 in. sample increases from about 20% to 75% under this treatment. Changes in transparency with time and temperature, during cooling of the polyethylene from 150°C. to various quench temperatures were investigated as a function of irradiation dose. The increase in transparency is a result of reduction in crystallinity, in size of crystallites and spherulites, and in rate of crystallization caused by the restraints imposed by the radiation-induced crosslinking.