Bibliographic Citation
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| Title | Radiation-oxidation of polymers |
| Creator/Author | Clough, R.L. ; Gillen, K.T. |
| Publication Date | 1989 Jan 01 |
| OSTI Identifier | OSTI ID: 6050016; Legacy ID: DE89014135 |
| Report Number(s) | SAND-89-1756C; CONF-8907108-1 |
| DOE Contract Number | AC04-76DP00789 |
| Other Number(s) | Other: ON: DE89014135 |
| Resource Type | Conference |
| Specific Type | Technical Report |
| Resource Relation | Conference: IAEA advisory group meeting on radiation degradation of polymers, Takasaki, Japan, 17-20 Jul 1989; Other Information: Portions of this document are illegible in microfiche products |
| Research Org | Sandia National Labs., Albuquerque, NM (USA) |
| Subject | 36 MATERIALS SCIENCE; POLYMERS; RADIATION EFFECTS; AGING; AIR; CHEMICAL RADIATION EFFECTS; DIFFUSION; ELONGATION; IRRADIATION; MECHANICAL PROPERTIES; OXIDATION; OZONE; PHYSICAL RADIATION EFFECTS; PROPYLENE; PVC; TIME DEPENDENCE; ALKENES; CHEMICAL REACTIONS; CHEMISTRY; CHLORINATED ALIPHATIC HYDROCARBONS; FLUIDS; GASES; HALOGENATED ALIPHATIC HYDROCARBONS; HYDROCARBONS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; POLYVINYLS; RADIATION CHEMISTRY |
| Description/Abstract | Radiation effects on polymers in the presence of air are characterized by complicated phenomena such as dose-rate effects and post-irradiation degradation. Most applications of polymeric materials in radiation environments involve air atmospheres. Taking account of oxidation effects and time-dependent phenomena is a necessity for understanding materials changes which occur during aging, and for dealing with issues of materials lifetime prediction, aging monitoring, materials selection, and material stabilization. Time-dependent radiation-degradation effects can be understood mechanistically in terms of: (1) features of the free radical chain-reaction chemistry underlying the oxidation, and (2) oxygen diffusion effects. A profiling technique has been developed to study heterogeneous degradation resulting from oxygen diffusion, and kinetic schemes have been developed to allow long-term aging predictions from short-term high-dose-rate experiments. These methodologies have been successfully applied for predicting degradation rates of a number of different materials under ambient nuclear environments. Low molecular weight additives which act either as free-radical scavengers or else as energy-scavengers are effective as stabilizers in radiation-oxidation environments. Non-radical oxidation mechanisms, involving species such as ozone, can also be important in the radiation-oxidation of polymers. 14 refs., 13 figs. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: X; Size: Pages: 16 |
| Availability | NTIS, PC A03/MF A01 - OSTI; 1. |
| System Entry Date | 2008 Feb 07 |
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Last Updated: 11/19/2009