HOT-FLOW CHARACTERISTICS OF IRRADIATED POLYETHYLENE
Abstract
Polyethylene disks, 0.55 in. diameter by 0.137 in. thick, were irradiated in air in the ground test reactor to five different gamma-ray dose levels: 2.2 x 10 to the 8th power, 4.72 x 10 to the 8th power, 1.64 x 10 to the 9th power, 4.99 x 10 to the 9th power, and 1.33 x 10 to the 10th power ergs/GM(C) plus the dose imparted by the associated neutron flux. After irradiation, the samples were compressed in a parallel-plate plastometer under constant load of 260 F for a period of five minutes. The thickness and the diameter of the extruded samples were measured at 75 F and found to be correlated with the absorbed gamma ray dose in a manner described by two empirically derived equations. An evaluation of the radiation-induced change in viscosity, of the disks showed that the dose region where departs from linearity is coincident with the most sensitive region of response in the hot- flow characteristics 10 to the 8th power - 1.5 x 10 to the 9th power erg/gm(C) . The results suggest that in this dose region, the described experimental procedure may be usefully employed for dosimetric purposes.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 15, 1963
- Accession Number
- AD0407815
Entities
People
- E. G. Fritz
- P. M. Johnson
Organizations
- General Dynamics