Photooxidation of polystyrene: irradiation at 254 and 365 nm
- Eastman Kodak Co., Rochester, NY
Studies have been made of the near surface photooxidation of atactic polystyrene films prepared in the absence of air. The samples were photooxidized on exposure to air at two frequencies, 254 and 365 nm, using a calibrated mercury irradiation source with filters. Most studies were made at 40/sup 0/C and as a function of irradiation time with the reactions characterized by changes in molecular weight and composition. The former was evaluated by gel permeation chromatography and the latter by transmission Fourier transform infrared ir spectroscopy and by multiple-internal-reflectance ir spectra using different angles and different crystals to evaluate compositions as a function of film depth. Species identified in photooxidation include the generation of hydroperoxides and the appearance of carbonyl bands with the latter identified by the spectral shift associated with the exposure of the photooxidized polystyrene surface to ammonia. These results suggest that principal products of near-surface oxidation of polystyrene are carboxylic acids. 6 figures, 1 table.
- OSTI ID:
- 5510496
- Journal Information:
- J. Appl. Polym. Sci.; (United States), Journal Name: J. Appl. Polym. Sci.; (United States) Vol. 28:10; ISSN JAPNA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxygen dependence of sensitization to 254-nm radiation by prior exposure to 365-nm radiation in strains of Escherichia coli K12 differing in DNA repair capability
Nanoconfinement-induced shift in photooxidative degradation pathway of polystyrene
Related Subjects
400500* -- Photochemistry
ANAEROBIC CONDITIONS
CARBOXYLIC ACIDS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DECOMPOSITION
EXPERIMENTAL DATA
FILMS
GEL PERMEATION CHROMATOGRAPHY
INFORMATION
INFRARED SPECTRA
MATERIALS
MEDIUM TEMPERATURE
MOLECULAR WEIGHT
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
SAMPLE PREPARATION
SEPARATION PROCESSES
SPECTRA
SPECTRAL SHIFT
SYNTHETIC MATERIALS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
YIELDS