Accession Number : ADA306626
Title : Azo Polymers for Reversible Optical Storage.11. Poly(4,4'-(1- Methylidene)Bisphenylene-3-4-(4-Nitrophenylazo)Phenyl3-Aza-Pentanedionate).
Descriptive Note : Technical rept.,
Corporate Author : QUEEN'S UNIV KINGSTON (ONTARIO) DEPT OF CHEMISTRY
Personal Author(s) : Meng, X. ; Natansohn, A. ; Rochon, P.
PDF Url : ADA306626
Report Date : 28 MAR 1996
Pagination or Media Count : 8
Abstract : Poly(4,4'-(1-methylethylidene)bisphenylene 3-(4-(4-nitrophenylazo)phenyl-3-aza-pentanedioate! (pMNAP) was synthesized through the condensation polymerization of 4,4'-isopropylidene-bis-phenol and N-4-(4-NITROPHENYLAZO)PHENYLimido diacetyl chloride. The polymer solution in tetrahydrofuran (THF) was spin-coated onto a glass substrate to form a film and the process of reversibly photoinduced birefringence was tested. The birefringence induced in the film was observed at a level of 0.04. The biexponential fitting of the birefringence growth and relaxation curves shows two kinds of processes. A fairly low birefringence relaxation occurs after the light is turned off, about 12% at room temperature and less than 50% at 138 deg C, close to the glass transition temperature (152 deg C). pMNAP decomposes at about 160 deg C which prevents its use as a material for optical storage.
Descriptors : *POLYMERS, *OPTICAL STORAGE, SOLUTIONS(MIXTURES), GROWTH(GENERAL), SUBSTRATES, GLASS, TRANSITION TEMPERATURE, REVERSIBLE, BIREFRINGENCE, RELAXATION, PHENYL RADICALS, FURANS, HYDROXYL RADICALS, DIAZO COMPOUNDS.
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE