ACOUSTIC PROPERTIES OF POLYETHYLENE NEAR THE MELTING POINT.

Abstract

Ultrasonic absorption and velocity measurements were made on high density polyethylene to above the melting point. The measurements were done at 53 kHz and showed a maximum in absorption in excess of 10 db/cm above the room temperature absorption. A simple two state theoretical model (crystalline and amorphous) correctly predicted the shape of the absorption curve but not the magnitude of the peak. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 04, 1969
Accession Number
AD0692377

Entities

People

  • Bruce Hartmann
  • Jacek Jarzynski

Organizations

  • Naval Ordnance Laboratory

Tags

DTIC Thesaurus Topics

  • Absorption
  • Acoustic Properties
  • Dielectric Polymers
  • High Density
  • Isothermal Processes
  • Measurement
  • Melting
  • Melting Point
  • Phase Transformations
  • Physical Properties
  • Thermodynamic Processes

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Reinforced Composite Materials