Ion recombination luminescence in polymer glasses induced by electron irradiation. I. High-vinyl polybutadiene

Journal Article · Thu Jan 01 04:00:00 EST 1976 · J. Polym. Sci.; (United States)

DOI:https://doi.org/10.1002/pol.1976.180140306· OSTI ID:7310522

Boehm, G G.A.

The luminescence of 1,2-polybutadiene was measured during and following irradiation with 1.4-MeV electrons at 90/sup 0/K. Measured under isothermal conditions, the light intensity at first increases sharply on start-up of irradiation, and then reaches a plateau after several seconds. The equilibrium value was found to be linearly dependent on the dose rate employed. The post-irradiation luminescence decay measured at 90/sup 0/K follows second-order kinetics. The light emitted by the irradiated sample during warm-up to room temperature is characterized by the appearance of four intensity maxima at 118, 168, 223, and 261/sup 0/K. The first three peaks are attributable to the onset of local motion, whereas the peak at 223/sup 0/K is caused by the long-range motion occurring at the glass-to-rubber transition. A preirradiation of the polymer in vacuo causes an increase in these four peaks as well as the formation of a new maximum at 143/sup 0/K. Intermittent exposure of the irradiated sample to light of wavelengths lambda > 450 nm causes the isothermal luminescence decay to be interrupted by a burst of light emitted by the sample during and shortly following the light exposure. This treatment also results in considerably reduced intensity maxima during warm-up to room temperature. An interpretation of the findings reported is given on the basis of reactions involving primary and secondary transient species produced during irradiation and on the molecular parameters of the polybutadiene.

• Research Organization: Firestone Tire and Rubber Co., Akron, OH
• OSTI ID: 7310522
• Journal Information: J. Polym. Sci.; (United States), Journal Name: J. Polym. Sci.; (United States) Vol. 14; ISSN JPSCA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360406* -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600 -- Radiation Chemistry
BEAMS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMISTRY
ELECTRON BEAMS
ENERGY RANGE
HYDROCARBONS
IONS
LEPTON BEAMS
LOW TEMPERATURE
LUMINESCENCE
MEV RANGE
MEV RANGE 01-10
ORGANIC COMPOUNDS
PARTICLE BEAMS
POLYENES
RADIATION CHEMISTRY
RADIATION EFFECTS
RECOMBINATION