Thermoluminescence of irradiated polystyrene. [X rays]
Thermoluminescence of irradiated polystyrene has been studied in the temperature range 100 to 440/sup 0/K. Three glow peaks with maxima at 160, 221, and 378/sup 0/K have been observed. These peaks are analyzed by different methods and the activation energies which were obtained are compared. The activation energies are found to be 0.22, 0.48, and 1.45 eV for the peaks with maxima at 160, 221, and 378/sup 0/K, respectively. Second-order kinetics is appropriate to all these cases. The glow peaks are attributed to the decay of the free radicals formed on irradiation and subsequent thermal stimulation. The peak with the maximum at 160/sup 0/K is attributed to electron trapping by the carbonyl groups or peroxy radicals formed on irradiation. The curve with the peak at 221/sup 0/K is attributed to the cyclohexadienyl radical, and the curve with the peak at 378/sup 0/K is attributed to the chain radical --CH/sub 2/--C (C/sub 6/H/sub 5/)--CH/sub 2/--. The centers responsible for the observed thermoluminescence are identified by correlation with electron spin resonance (ESR) data obtained on the same samples.
- Research Organization:
- Indian Inst. of Tech., Madras
- OSTI ID:
- 5376870
- Journal Information:
- J. Polym. Sci., Polym. Chem. Ed.; (United States), Vol. 15:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
POLYSTYRENE
CHEMICAL RADIATION EFFECTS
HIGH TEMPERATURE
LOW TEMPERATURE
MEDIUM TEMPERATURE
THERMOLUMINESCENCE
X RADIATION
CHEMISTRY
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
LUMINESCENCE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
400600* - Radiation Chemistry