ASTM D832-07(2012)
Standard Practice for Rubber Conditioning For Low Temperature Testing

Standard No.
ASTM D832-07(2012)
Release Date
2007
Published By
American Society for Testing and Materials (ASTM)
Status
Replace By
ASTM D832-07(2018)
Latest
ASTM D832-07(2018)
Scope

3.1 Low temperature testing of rubber can yield repeatable results only if the preconditioning of the samples is consistent. Properties such as brittleness and modulus are greatly affected by variations in time/temperature exposures. This practice is intended to provide uniform conditioning for the various low temperature tests conducted on rubbers.

1.1 This practice covers the characteristic mechanical behavior of rubbers at low temperatures, and outlines the conditioning procedure necessary for testing at these temperatures.

1.2 One of the first stages in establishing a satisfactory technique for low temperature testing is the specification of the time and temperature of exposure of the test specimen. It has been demonstrated that any one or more of the following distinct changes, which are detailed in Table 1, may take place on lowering the test temperature:

TABLE 1 Differentiation Between Crystallization and Glass Transition

Property

Crystallization

Glass Transition

Physical effects
(1, 2, 4, 6, 7)A

Becomes stiff (hard) but not necessarily brittle

Becomes stiff and brittle

Temperature-volume relation
(1, 2, 3, 4, 5, 8)

Significant decrease in volume

No change in volume, but definite change in coefficient of thermal expansion

Latent heat effect (4, 5, 8)

Heat evolved on crystallization

Usually no heat effect, but definite change in specific heat

Rate (2, 4, 6, 7, 8)

Minutes, hours, days, or even months may be required. In general, as temperature is lowered, rate increases to a maximum and then decreases with increase ......

ASTM D832-07(2012) Referenced Document

  • ASTM D1053 Standard Test Methods for Rubber Property—Stiffening at Low Temperatures: Flexible Polymers and Coated Fabrics
  • ASTM D1329 Standard Test Method for Evaluating Rubber Property-Retraction at Lower Temperatures (TR Test)
  • ASTM D1566 Standard Terminology Relating to Rubber
  • ASTM D2136 Standard Test Method for Coated Fabrics-Low-Temperature Bend Test
  • ASTM D471 Standard Test Method for Rubber Property-Effect of Liquids
  • ASTM D5964 Standard Practice for Rubber IRM 902 and IRM 903 Replacement Oils for ASTM No. 2 and ASTM No. 3 Oils

ASTM D832-07(2012) history

  • 2018 ASTM D832-07(2018) Standard Practice for Rubber Conditioning For Low Temperature Testing
  • 2007 ASTM D832-07(2012) Standard Practice for Rubber Conditioning For Low Temperature Testing
  • 2007 ASTM D832-07 Standard Practice for Rubber Conditioning For Low Temperature Testing
  • 1992 ASTM D832-92(2001)e1 Standard Practice for Rubber Conditioning For Low-Temperature Testing
  • 1992 ASTM D832-92(1997) Standard Practice for Rubber Conditioning For Low-Temperature Testing
Standard Practice for Rubber Conditioning For Low Temperature Testing


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