THERMOMECHANICAL STUDIES OF POLYMER DEFORMATION. II. A THERMODYNAMIC ANALYSIS OF A VISCOELASTIC MATERIAL IN SINUSOIDAL DEFORMATION.

Abstract

A linearly viscoelastic polyurethane film was subjected to steady, sinusoidal deformation in a new isothermal deformation calorimeter, whose design details were recently reported. Internal energy and entropy of the polymer at each state in the deformation cycle were computed from heat rate and work rate data. This was made possible by using linear viscoelasticity theory to predict the irreversible entropy production. Thermal data were corrected for instrument time lag. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0704818

Entities

People

  • C. G. Gogos
  • I. J. Duvdevani
  • J. A. Biesenberger

Organizations

  • Stevens Institute of Technology

Tags

DTIC Thesaurus Topics

  • Calorimeters
  • Composite Materials
  • Films
  • Macromolecules
  • Materials
  • Molecules
  • Plastics
  • Polymers
  • Polyurethanes
  • Production
  • Synthetic Polymers
  • Viscoelasticity

Readers

  • Polymer Science and Technology
  • Powder metallurgy of Titanium alloys.
  • Structural Health Monitoring of Composite Structures.