EFFECT OF ENVIRONMENTAL HYDROGEN PRESSURE ON THE HYDROGEN YIELD FROM XIRRADIATED POLYETHYLENES.
Abstract
An experimental assembly incorporating a capacitancetype, differential pressure transducer, which provides resolutions of 0.3 micron at pressures extending to 30 mm, has been employed to monitor the effect of hydrogen environmental pressure on the hydrogen yield from Xirradiated polyethylenes. Contrary to the observations of previous researchers, the hydrogen yield is found to be independent of hydrogen environmental pressures extending up to at least 30 mm Hg. It is demonstrated that neglecting the temperature and density gradients inherent in closed-volume irradiation assemblies employing cryogenic traps to separate liberated gases into condensable and noncondensable fractions may lead to erroneous conclusions with respect to gas yields arising from the irradiation of materials. Total volatile G-values of 3.6, 3.8, and 4.0 molecules per 100 ev were obtained for Marlex 6002, Dow Ziegler (Q 917.5), and DuPont A-1410 polyethylenes, respectively, with hydrogen contributions of approximately 98 mole percent. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0611561
Entities
People
- O. H. Hill
- R. P. Lightfoot
Organizations
- General Dynamics