Diffusion of Small Molecules in Bulk Polymers and Polymer Solutions Near the Glass Transition Temperature by Forced Rayleigh Scattering

Abstract

The transient optical grating technique of forced Rayleigh scattering has been used to follow the diffusion of photochromic dye molecules in polymer solutions, both above and below the glass transition temperature. The results are largely in accord with free volume theories. However, the absolute magnitude of the diffusion coefficient at the glass transition temperature is a remarkably strong function of composition. Diffusion; Glasses; Polymer solutions; Forced Rayleigh scattering.

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Document Details

Document Type
Technical Report
Publication Date
Dec 19, 1988
Accession Number
ADA205241

Entities

People

  • Timothy P. Lodge

Organizations

  • University of Minnesota

Tags

DTIC Thesaurus Topics

  • Acquisition
  • Alkenes
  • Celestial Brightness
  • Chemistry
  • Coefficients
  • Data Acquisition
  • Diffusion Coefficient
  • Glass Transition Temperature
  • Measurement
  • Military Research
  • Molecules
  • Polymers
  • Rayleigh Scattering
  • Scattering
  • Security
  • Small Molecules
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Optical Physics and Photonics.