MEASUREMENT OF RUBBER ELASTICITY AT LOW TEMPERATURES USING A TWIST RECOVERY APPARATUS

Abstract

The apparatus and methods described in the report provide a new means of observing and measuring the low -temperature behavior of rubber. Since, in actual use, rubber is very often deformed only slightly, the new method subjects the test specimen to a twist deformation of 360 degrees, resulting in an elongation of approximately 5 percent along its side. The apparatus permits twist recovery and percentage of set to be measured at specific constant temperatures and also to be correlated with rising temperatures. The results show that, with the exception of a series of ethylene/ propylene/diene (EPD) rubber compounds, both the elasticity and the flexibility of rubbers are regained within the same range of low temperatures. The stress-strain behavior of EPD rubbers, which differs from that of other types of rubber, is briefly discussed. These techniques can be used not only to examine the basic behavior of rubbery materials, but also in the routine inspection of rubber items and components.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
AD0630909

Entities

People

  • Angus Wilson

Organizations

  • United States Army Soldier Systems Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkenes
  • Biomedical And Dental Materials
  • Butadienes
  • Climate Change
  • Contracts
  • Crystallization
  • Dienes
  • Elastomers
  • Materials Laboratories
  • Materials Testing
  • Metals
  • Modulus Of Elasticity
  • Natural Rubber
  • Physical Properties
  • Polymers
  • Rubber
  • Test Methods

Readers

  • Materials Science and Engineering.
  • Nuclear and Radiation Engineering.
  • Polymer Science and Technology