Accession Number : AD0752264

Title :   Polymer Photoprotection by Copolymerized Triplet Quenchers,

Corporate Author : DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s) : George,G. A.

Report Date : 02 FEB 1972

Pagination or Media Count : 7

Abstract : From a model of delocalized triplet energy in an aromatic vinyl polymer, the relative efficiency of triplet-energy transfer to either an added or copolymerized quenching molecule is determined. It was found that copolymerization can increase the photoprotective efficiency only if the quenching rate is determined by the final energy transfer step. A study of the quenching of polystyrene phosphorescence by added or copolymerized naphthalene indicates that there is no enhancement of quenching efficiency by copolymerization. (Author)

Descriptors :   (*VINYL PLASTICS, *PHOTOCHEMICAL REACTIONS), (*DEGRADATION, VINYL PLASTICS), ELECTRON TRANSITIONS, MOLECULAR ENERGY LEVELS, ADDITIVES, COPOLYMERIZATION, QUENCHING(INHIBITION), AROMATIC COMPOUNDS, STYRENE PLASTICS, NAPHTHALENES, AUSTRALIA

Subject Categories : Radiation and Nuclear Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE