Studies of Elastic Properties on Stretch Films of Polycarbonate by Brillouin Scattering.

Abstract

Results of the Brillouin scattering study of polycarbonate (PC) films stretched at a temperature slightly above Tg are reported. The elastic constants C11, C13, C33, and C44 are determined as a function of stretched ratio. Using the affine orientational model recently developed by Wang and Cavanaugh, the orientation parameter is obtained as a function of stretched ratio. The changes in the elastic constants and the orientation parameter are discussed in terms of chain morphology. The results in PC films are found to be significantly different from other polymer films, such as poly(ethylene terephthalate) and isotactic polypropylene, recently investigated in this laboratory. The reason for the difference is discussed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 22, 1982
Accession Number
ADA112208

Entities

People

  • C. H. Wang
  • Quan-l. Liu

Organizations

  • University of Utah

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Chemical Engineering
  • Chemistry
  • Civil Engineering
  • Crystal Structure
  • Elastic Properties
  • Equations
  • Hypersonic Velocity
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • New York
  • Polymeric Films
  • Transverse Waves

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.