IMPROVED IRRADIATED POLYETHYLENE
Patent
·
OSTI ID:4174733
An irradiated polyethylene stabilized to high-temperature oxidation by sym-di- beta -naphthyl-p-phenylenediamine (DNPPD) and its preparation are described. In an example, samples of solid polyethylene DYNH (m.w. = 21,000) were compounded with 0.5 wt.% of various antioxidants including DNPPD and molded in sheets and irradiated to 15 x 10/sup 6/ r with high-energy electrons. The samples were compared by measuring the power factors at 1 megacycle in air at 150 deg C until failure. The power factors for all samples at the beginning were 0.001 and ranged from 0.002 for the sample with the preferred stabilizer to 0.04 for one of the others. Thus the preferred stabilizer maintains the oxidation resistance at a higher level for a longer period of time. (T.R.H.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-14-013040
- OSTI ID:
- 4174733
- Report Number(s):
- GB 830899
- Country of Publication:
- United Kingdom
- Language:
- English
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