Accession Number:

AD0611561

Title:

EFFECT OF ENVIRONMENTAL HYDROGEN PRESSURE ON THE HYDROGEN YIELD FROM XIRRADIATED POLYETHYLENES.

Descriptive Note:

Technical rept. for 1 Oct 63-30 Sep 64,

Corporate Author:

GENERAL DYNAMICS/FORT WORTH TEX NUCLEAR AEROSPACE RESEARCH FACILITY

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

36.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE