DIELECTRIC RELAXATION AND STRUCTURE

Abstract

Progress was made in understanding the relations between molecular relaxation times and molecular size and shape, dipole location in the molecule, and viscosity of the material. New evidence was obtained on the distribution of relaxation times and the mechanisms involved. The intramolecular rotation of several groups was consistent with their sizes, and the corresponding relaxation times have, in some instances, given concrete evidence of steric repulsion. Evidence was obtained of a shift of electronic charge with rotation of an aromatic ring around its bond to an O atom and, probably, also to a N atom. Analysis of previous measurements on solids showed relationships between dielectric behavior, molecular shape, and plasticity or rigidity of the solid. Microwave measurements of dielectric loss established the non-polarity of seemingly symmetrical molecules. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 06, 1962
Accession Number
AD0271121

Entities

People

  • Charles P. Smyth

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Advanced Materials
  • Concrete
  • Engineered Materials
  • Materials
  • Measurement
  • Mechanical Properties
  • Microwaves
  • Molecules
  • Physical Properties
  • Plastic Properties
  • Polarity
  • Relaxation Time
  • Rigidity
  • Rotation
  • Viscosity

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Molecular Photonics/Laser Physics
  • Organic Chemistry

Technology Areas

  • Microelectronics