Radiation-induced oxidation of solid poly(ethylene oxide). I. Experimental results. [. gamma. rays]

Journal Article · Fri Apr 01 04:00:00 EST 1977 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1977.170150402· OSTI ID:5311435

Decker, C

..gamma..-Initiated oxidations of solid poly(ethylene oxide) (PEO) have been carried out at ambient temperatures and the dependence of the rate of oxygen consumption on rate of initiation, O/sub 2/ pressure, and crystallinity has been determined. At 25/sup 0/C, the radiation yield G for O/sub 2/ absorbed is 117 to 281, depending on dose rate, and decreases moderately with increasing crystallinity. The principal oxidation products are formate and hemiformal groups, hydroperoxides, and some volatile compounds, mainly formaldehyde and carbon dioxide. The rates of O/sub 2/ consumption and formation of products and chain scission are little affected by a change of the temperature in the range -23 to +55/sup 0/C except for hydroperoxide, the formation of which requires an activation energy of 4 kcal/mole. Experiments with 2,6-di-tert-butyl-p-cresol show that essentially all of the initiating PO/sub 2/ . radicals escape cage termination; G value for formation of the initiating peroxy radicals was estimated from the inhibition period to be 5.0 +- 0.3.

• Research Organization: Centre de Recherches sur les Macromolecules, Strasbourgh
• OSTI ID: 5311435
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 15:4; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
ELECTROMAGNETIC RADIATION
G VALUE
GAMMA RADIATION
IONIZING RADIATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
POLYETHYLENE GLYCOLS
POLYMERS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS