Directive Evidence for the Creation of Micropores in UV-Irradiated Poly(Methyl Methacrylate)

Abstract

Films of Poly-Methyl Methacrylate including azobenzene were prepared by casting polymer solutions containing the probe or by exposing pre-irradiation films to the vapor of azobenzene. Under similar conditions, films which had been irradiated imbided more azobenzene than annealed, unirradiated films or irradiated films which had been annealed above glass transition temperature. These materials were irradiated at 335 nanometers and the amount of trans azobenzene which had been formed was monitored spectrophotometrically. The largest amount of photoisomerization was observed for the pre-irradiated samples which has been penetrated by azobenzene from the vapor, indicating that the created free volume allowed the isomerization to proceed more easily. (JG)

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1990
Accession Number
ADA222258

Entities

People

  • J. A. Moore
  • Jin O. Choi

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Alkenes
  • Chemical Properties
  • Chemistry
  • Engineering
  • Films
  • Glass Transition Temperature
  • Macromolecules
  • Materials
  • Methacrylates
  • New York
  • Physical Properties
  • Polymeric Films
  • Polymers
  • Radiation
  • Security
  • Transition Temperature
  • United States

Fields of Study

  • Chemistry

Readers

  • Nuclear and Radiation Engineering.
  • Polymer Science and Technology