Accession Number : AD0686020

Title :   PHOTOPHYSICAL PROCESSES IN POLYMER PHOTODEGRADATION INTRACHAIN TRIPLET TRANSFER IN POLY(1-VINYLNAPHTHALENE) AND POLY(1-VINYLNAPHTHALENE-CO-METHYL METHACRYLATE),

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Fox,R. B. ; Cozzens,R. F.

Report Date : 17 MAR 1969

Pagination or Media Count : 14

Abstract : Poly(1-vinylnaphthalene) in a rigid glass at 77K exhibits a delayed fluorescence due to triplet-triplet annihilation resulting from intramolecular triplet-energy transfer through the naphthalene chromophores. The delayed fluorescence does not appear in the spectrum of 1-ethylnaphthalene. Delayed emission from the polymer but not from the small-molecule analog is quenched by piperylene. End groups are of greater importance than chain length in the control of triplet migration in the homopolymer; experiments with 1-vinylnaphthalenemethyl methacrylate copolymers, however, indicate that a specific minimum chain length is required for efficient transfer. (Author)

Descriptors :   (*POLYMERS, *FLUORESCENCE), (*VINYL PLASTICS, FLUORESCENCE), (*PHOTOCHEMICAL REACTIONS, POLYMERS), NAPHTHALENES, MOLECULAR ENERGY LEVELS, ACRYLIC RESINS, ELECTRON TRANSITIONS

Subject Categories : Radiation and Nuclear Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE