Studies of the Effect of Orientation on the Elastic Constants of Stretched and Hydrostatically Extruded Poly (Chlorotriflouroethylene): A Model of Affine Orientation in Semi-Crystalline Polymers.

Abstract

A model of affine orientation of polymer solids is given. The solid is described as a collection of small, orientable units. The elastic constants of the oriented polymer are given as a combination of the elastic constants of the orientable units and of the orientation parameters <P sub 2(cos Theta)> and <P sub 4 (cos Theta)>. The elastic constants of stretched and hydrostatically extruded samples of poly (chlorotriflouroethylene) are obtained with Brillouin light scattering. These are fitted to the model and the orientation parameters are calculated. The elastic constants from the extruded samples are fit well by the model but the fit to the stretched film is less satisfactory by the model. Hydrostatic extrusion in polymers is thus assumed to be an affine orientation process in the amorphous phase and the stretching process is non-affine. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 13, 1981
Accession Number
ADA107909

Entities

People

  • C. H. Wang
  • D. B. Cavanaugh

Organizations

  • University of Utah

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Brillouin Scattering
  • Chemical Engineering
  • Chemistry
  • Crystal Structure
  • Diffraction
  • Engineering
  • Light Scattering
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Military Research
  • Scattering
  • Spectra
  • United States

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.