Accession Number : ADA307909

Title :   Dynamic Processes of Optically Induced Birefringence of Azo Compounds in Amorphous Polymers below Tg.

Descriptive Note : Technical rept.,

Corporate Author : NEBRASKA UNIV LINCOLN DEPT OF CHEMISTRY

Personal Author(s) : Song, O. -K. ; Wang, C. H. ; Pauley, M. A.

PDF Url : ADA307909

Report Date : 30 APR 1996

Pagination or Media Count : 30

Abstract : The growth and decay processes of the optically induced birefringence in an azobenzene functionalized polymer, DRI9FPOZ (full given in the text) and in another azobenzene guest/host polymer system have been studied. The temperature dependence of the birefringence signal is studied and possible mechanisms associated with the growth and decay segments of the signal are analyzed. Rate constants deduced from the optically induced birefringence signal are also investigated as a function of the laser excitation power and film thickness. The rate constants associated with the growth and decay processes and activation energies are obtained from the Arrhenius plots of the temperature dependent rate constants below the glass transition temperature of the polymer system.

Descriptors :   *OPTICAL PROPERTIES, *POLYMERS, *AMORPHOUS MATERIALS, *BIREFRINGENCE, *AZOBENZENES, THERMAL PROPERTIES, TEMPERATURE, THICKNESS, DYNAMICS, GROWTH(GENERAL), EXCITATION, FILMS, RATES, GLASS, LASERS, TRANSITION TEMPERATURE, SIGNALS, CONSTANTS, POWER, DECAY, ACTIVATION ENERGY, ARRHENIUS EQUATION, DIAZO COMPOUNDS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Physical Chemistry
      Laminates and Composite Materials
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE