ASTM D1646 PDF

This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D11 on. ASTM D covers the test methods for measuring Mooney Viscosity, Mooney Stress Relaxation, and Mooney Scorch. Mooney Viscosity and Stress Relaxation . CCSi Ultra-Life Specimen Cutting Dies: ASTM D D Upper Specimen Die. D Lower Specimen Die. CCSi manufactures these high quality.

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This can result in different viscosity values for some rubbers. Viscosity as used in these test methods is not a true viscosity and should be interpreted to mean Mooney viscosity, adtm measure of shearing torque averaged over a range of shearing rates. Historical Version s – view previous versions of standard.

A slow rate of relaxation f1646 a higher elastic component in the overall response, while a rapid rate of relaxation indicates a higher viscous component. Stress relaxation is also a function of the test configuration and for these test methods the results are unique to the Mooney viscometer.

Viscosity as used in these test methods is not a true viscosity and should be interpreted to mean Mooney viscosity, a measure of shearing torque averaged over a range of shearing rates. Active view current r1646 of standard. In addition to a few insignificant differences there are major technical differences between ISO and this test method in that ISO does not provide for sample preparation on a mill, while this test method allows milling sample preparation in some cases prior to running a Mooney viscosity test.

This can result in different viscosity values for some rubbers.

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Link to Active This link will always route to the current Active version of astj standard. Since rubber behaves as a non-Newtonian fluid, no simple relationship exists between the molecular weight and the viscosity.

Thus both of these tests are important and complement each other. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

The dimensions of the shearing disk viscometer, test s1646, and procedures for determining Mooney viscosity are defined in these test methods. D166 viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a cylindrical cavity. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Mooney viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a cylindrical cavity. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. This test method cannot be used to study complete vulcanization because the continuous rotation of the disk will result in slippage when the specimen reaches a stiff consistency.

The values dd1646 in parentheses are for information only. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are astj provided as part of the standard.

This is called ‘stress relaxation’ and these test methods describe a test method for measuring this atm. Therefore, this test method can be used to measure incipient cure scorch time and the rate of cure during very early stages of vulcanization.

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ASTM D1646

Stress relaxation is also a function of the test configuration and for these test methods the satm are unique to the Mooney astj. For these higher molecular weight rubbers, better correlation between viscosity values and molecular weight is obtained d16466 the test temperature is increased. Therefore, caution must be exercised in interpreting viscosity values of rubber, particularly in cases where molecular weight is very high. Historical Version s – view previous versions of standard Translated Version s: The values given in parentheses are for information only.

In addition to a few insignificant differences there are major technical differences between ISO and this test method in that ISO does not provide for sample preparation on a mill, while this test method allows milling sample preparation in some cases prior to running a Mooney viscosity test. The dimensions of the shearing disk viscometer, test temperatures, and procedures for determining Mooney viscosity are defined in these test methods.

The rate of stress relaxation has been found to correlate with rubber structure characteristics such as molecular weight dd1646, chain branching, and gel content.

Testing Standards List

Asgm test methods include procedures for measuring the initial rate of rubber vulcanization. These test methods include procedures for measuring the initial rate of rubber vulcanization. Viscosity and stress relaxation behavior do not depend on such factors as molecular weight and non-rubber constituents in the same way. Link to Active This link will always route to the current Active version of the standard.