Azo Polymers for Reversible Optical Storage. 12. Poly ?1- Acryloyl-4-4- (4-Nitrophenylazo)PhenylPiperazine!.

Abstract

Two azo-containing vinyl monomers, 1-acryloyl-4-4-(4-NITROPHENYLAZO)PHENYLpiperazine! (ANPP) and 1-methacryloyl-4-4-(4-NITROPHENYLAZO)PHENYLpiperazine! (MNPP), were synthesized. MNPP did not polymerize in a few solvents, with a few free radical initiators and at a few temperatures. pANPP is amorphous with a Tg of 156 deg C and decomposes above 230 deg C. Birefrigence can be induced by a polarized laser (514 nm) on a pANPP film to a level of 0.1 and is very stable. Comparison is made with poly(4'-(2-(ACRYLOYLOXY)ETHYL) ETHYLAMINO-4-nitroazobenzene! (pDR1A). Biexponential curve fitting shows a lower writing rate for pANPP. both the slow response to the laser and the higher stability of the photoinduced birefringence are due to the 'rigid' piperazine linkage between azobenzene groups and backbone which prevents the azo groups from rotating freely. pANPP decomposes under long term exposure to the laser.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 10, 1996
Accession Number
ADA314645

Entities

People

  • Almeria L. Natansohn
  • Paula A. Rochon
  • Xianghai Meng

Organizations

  • Queen's University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • 1-Ring Heterocyclic Compounds
  • Azobenzenes
  • Birefringence
  • Chemical Synthesis
  • Chemistry
  • Curve Fitting
  • Films
  • Free Radicals
  • Glass Transition Temperature
  • Laser Beams
  • Mechanical Properties
  • Optical Storage
  • Orientation (Direction)
  • Polymeric Films
  • Polymers
  • Spine
  • Transition Temperature

Readers

  • Optical Physics and Photonics.
  • Polymer Science and Technology

Technology Areas

  • Directed Energy