Accession Number : AD0664883

Title :   PULSE RADIOLYSIS OF POLYSTYRENE,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Ho,S. K. ; Siegel,Seymour ; Schwarz,Harold A.

Report Date : OCT 1967

Pagination or Media Count : 31

Abstract : The optical absorption spectra of the transient species produced by pulse electron radiolysis of polystyrene are reported. Polystyrene samples containing various aromatic solutes, as well as solute-free polystyrene samples, were examined. In solute-free polystyrene, the negative ion of polystyrene is observed. However, in samples containing triphenylamine as a solute, the solute positive ion is observed. The decay constants of the ion populations are of the order of milliseconds. In polystyrene samples containing aromatic solutes, the only new species observed are the corresponding solute triplet state molecules. Analysis of the data indicates that the energy transfer from host polymer to solute occurs by a random walk migration of singlet state excitation energy in the polymer. Solute triplet state molecules are formed by intramolecular intersystem crossing in the solute molecule.

Descriptors :   (*STYRENE PLASTICS, *RADIATION CHEMISTRY), ELECTRON IRRADIATION, DECOMPOSITION, SOLUTIONS(MIXTURES), AMINES, POLYCYCLIC COMPOUNDS, MOLECULAR ENERGY LEVELS, RELAXATION TIME, FREE RADICALS, TRANSPORT PROPERTIES, ABSORPTION SPECTRA

Subject Categories : Radiation and Nuclear Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE