ESR studies of some. gamma. -irradiated organic crystals. [N-tert-butylacrylamide, propionamide]

Journal Article · Mon Nov 30 23:00:00 EST 1981 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1981.170191202· OSTI ID:5815064

Kilic, S ^[1]; Baysal, B M

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1. Miidle East Technical Univ., Ankara, Turkey

Acrylamide, N-tert-butylacrylamide, and propionamide crystals were irradiated at -196/sup 0/C and the structures of radicals studied by ESR spectroscopy at various temperatures. The ..gamma..-irradiated acrylamide crystals show a five-line spectrum which is similar in shape to the signal obtained from the ..gamma..-irradiated propionamide crystals. Two types of radicals are produced in irradiated acrylamide and propionamide crystals at -196/sup 0/C. When the irradiated samples are kept at -78/sup 0/C the spectrum of propionamide remains the same, except in intensity. In contrast to this, the acrylamide spectrum changes to a triplet because of dimerization. Upon warming the irradiated acrylamide sample to between -50 and -30/sup 0/C, some small new peaks become apparent on either side of the triplet. These new peaks disappear above -20/sup 0/C and the spectrum changes to a triplet because of polymerization. To observe the changes in the ESR spectra of ..gamma..-irradiated N-tert-butylacrylamide we kept the sample at various temperatures from -196 to 100/sup 0/C. From -196/sup 0/C to about room temperature the spectrum is a quintet. At and above 35/sup 0/C, the spectrum changes to a triplet with shoulders on either side of the main peaks. With further warming above 80/sup 0/C the spectrum changes to a broad triplet.

• OSTI ID: 5815064
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 19:12; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ACRYLAMIDE
AMIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CRYSTALS
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
LOW TEMPERATURE
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RESONANCE
SPECTROSCOPY
TEMPERATURE EFFECTS