Photoradiative processes in polystyrene
In ..gamma..-irradiated atactic polystyrene at 77 K the stabilization of trapped electrons (lambda /SUB max/ > 1000 nm) with the quantum yield G about 0.06, anion radicals (lambda /SUB max/ = 405, 460 nm) with G = 0.6, cation radicals (lambda /SUB max/ = 360, 480, 525, and 920 nm), and free radicals with G = 0.2 was observed. The photoexcitation of trapped electrons causes their recombination with quantum yield Q = 0.06 + or - 0.03. The excitation of cation radicals leads to the formation of free radicals. The photoexcitation of anion radicals results in their photoionization with the subsequent electron trapping by intermolecular traps. The radicals formed during the photoexcitation of charged particles are stabilized basically within a single kinetic cell.
- Research Organization:
- L.Y. Karpov Sci-Res. Institute of Physical Chemistry
- OSTI ID:
- 7005313
- Journal Information:
- High Energy Chem. (Engl. Transl.); (United States), Journal Name: High Energy Chem. (Engl. Transl.); (United States) Vol. 20:2; ISSN HIECA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMISTRY
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELECTRONS
ELEMENTARY PARTICLES
EMISSION
FERMIONS
GAMMA RADIATION
IONIZATION
IONIZING RADIATIONS
IRRADIATION
KINETICS
LEPTONS
MAGNETIC RESONANCE
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOTOEMISSION
PHOTOIONIZATION
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
REACTION KINETICS
RESONANCE
SECONDARY EMISSION
SPECTRA
SYNTHETIC MATERIALS
TRAPS