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BS 903-A13:1990:2004 Edition

$86.31

Physical testing of rubber – Method for determination of stiffness at low temperature (Gehman test)

Published By Publication Date Number of Pages
BSI 2004 14
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Static procedure for determining the relative stiffness characteristics of vulcanized or thermoplastic rubbers over a temperature range of approximately 23°C to -150°C.

PDF Catalog

PDF Pages PDF Title
1 BRITISH STANDARD
2 Committees responsible for this British�Standard
3 Contents
5 1 Scope
2 Apparatus
2.1 Torsion apparatus
2.2 Torsional wires
2.3 Test piece rack
2.4 Temperature-measuring device
2.5 Heat-transfer medium
2.6 Temperature control
2.7 Tank
2.8 Stirrer
2.9 Stopwatch
7 3 Test piece
3.1 Preparation of test piece
3.2 Conditioning of test piece
4 Procedure
4.1 Calibration of torsion wire
4.2 Mounting of test piece
8 4.3 Stiffness measurements in liquid media
4.4 Stiffness measurement in gaseous media
9 4.5 Crystallization
5 Number of tests
6 Expression of results
6.1 Twist versus temperature curve
6.2 Torsional modulus
6.3 Relative modulus
6.4 Apparent torsional modulus of rigidity
10 Twist angles for designated values of the relative modules (RM)
11 Values
7 Test report
BS 903-A13:1990
$86.31