Raman Scattering Studies of Chain Orientation in Hydrostatically Extruded Polypropylene.

Abstract

Raman scattering is used in the study of hydrostatically extruded polypropylene as a function of the extrusion ratio. At a high extrusion ratio. At a high extrusion ratio, polypropylene gives rise to Raman spectra with a well characterized polarization behavior. This result has been used to supplement the symmetry assignments of normal vibrations in polypropylene. The intensity ratios and depolarization ratios have also been measured as a function of the extrusion ratio. The c-axis alignment of the polymer chain has been found to increase with the increase of the extrusion ratio. At the extrusion ratio equal to 6.3, about 90% of the polymer chains have been found to align along the direction of extrusion (the c-axis). (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 08, 1977
Accession Number
ADA041096

Entities

People

  • C. H. Wang
  • H. Kanetsuna
  • S. K. Satija

Organizations

  • University of Utah

Tags

DTIC Thesaurus Topics

  • Chemistry
  • Depolarization
  • Diffraction
  • Measurement
  • Mechanical Properties
  • Molecules
  • Orientation (Direction)
  • Polarization
  • Polymers
  • Radiation
  • Raman Scattering
  • Raman Spectra
  • Scattering
  • Spectra
  • Spectroscopy
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Molecular Photonics/Laser Physics
  • Polymer Science and Engineering.