PHOTOPHYSICAL PROCESSES IN POLYMER PHOTODEGRADATION INTRACHAIN TRIPLET TRANSFER IN POLY(1-VINYLNAPHTHALENE) AND POLY(1-VINYLNAPHTHALENE-CO-METHYL METHACRYLATE),
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 17, 1969
- Accession Number
- AD0686020
Entities
People
- R. B. Fox
- R. F. Cozzens
Organizations
- United States Naval Research Laboratory