High Speed Electron Spin Resonance Studies of Free Radicals in Stressed Polymers.

Abstract

It has been known for some time that mechanical stressing of a polymer is accompanied by bond rupture. The number of bonds ruptured is dependent on the sample morphology, the method of mechanical degradation, and the temperature relative to T sub G. If a sufficient number of bonds rupture, the free radicals thus formed are detectable using electron spin resonance (ESR) techniques. The information which has been uncovered in the extensive ESR studies of polymer fracture is outlined. Employment of microsecond response time ESR instrumentation is proposed for characterizing the sequence of radical reactions triggered by polymer fracture above cryogenic temperatures. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1977
Accession Number
ADA046792

Entities

People

  • A. D. Britt
  • W. B. Moniz

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Block Copolymers
  • Chemistry
  • Electron Spin Resonance
  • Electrons
  • Energy Systems
  • Free Radicals
  • Jet Propulsion
  • Low Temperature
  • Magnetic Fields
  • Materials
  • Military Research
  • Polymers
  • Resonance
  • Scientific Research
  • Spin Resonance

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics