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.

Author: Galabar Tulmaran
Country: Lesotho
Language: English (Spanish)
Genre: Literature
Published (Last): 16 March 2011
Pages: 108
PDF File Size: 14.8 Mb
ePub File Size: 15.61 Mb
ISBN: 855-5-52431-694-6
Downloads: 95122
Price: Free* [*Free Regsitration Required]
Uploader: Goltijora

The dimensions of the shearing disk viscometer, test temperatures, and procedures for determining Mooney viscosity are defined in these test methods.

Viscosity as used d1664 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.

Historical Version s – view previous versions of standard Translated Version s: 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 asmt defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a cylindrical cavity.

Therefore, caution must be exercised in interpreting viscosity values of rubber, particularly in cases where molecular weight is very high. Therefore, this awtm method can be used to measure incipient cure scorch time and the rate of cure during very early stages of vulcanization.

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 d1466 Mooney viscosity, a measure of shearing torque averaged over a range of shearing rates. The dimensions of the shearing disk viscometer, test temperatures, and procedures for determining Mooney viscosity are defined in these test methods.

TOP Related Posts  DICCIONARIO CHELI PDF

Since rubber behaves as a non-Newtonian fluid, no simple relationship exists between the molecular weight and the viscosity. Viscosity and stress relaxation behavior do not depend on such factors as molecular weight and non-rubber constituents in the same way. R1646 to Active This link will always route to the current Active version of the standard. 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.

A slow rate of relaxation indicates a higher elastic component in the overall response, while a rapid rate of relaxation indicates a higher viscous component.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the 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 f1646 sample preparation on a mill, while this test method allows milling sample preparation in some cases prior to running a Mooney viscosity test.

Stress relaxation is also a function of the test configuration and for these test methods the results are unique to the Mooney viscometer. For these higher molecular weight rubbers, better correlation between viscosity values and molecular weight is obtained if the test temperature is increased.

Link to Active This link will always route to the current Active version of the standard. The values given in parentheses are for information only.

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. Mooney viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a cylindrical cavity.

TOP Related Posts  SARAS SALIL PDF

Thus both of these tests are important and complement each other. These test methods include procedures for measuring the initial rate of rubber vulcanization.

ASTM D1646

Historical Version s – view previous versions of standard. Stress relaxation is also a function of the test configuration and for these test methods the results are unique to the Mooney viscometer.

Active view current version of standard.

The rate of stress relaxation has been found to correlate with qstm structure characteristics such as molecular weight distribution, chain branching, and gel content. These test methods include procedures for measuring the initial rate of rubber vulcanization.

Testing Standards List

This can result in different viscosity values for some rubbers. It is the responsibility of the user of this standard to establish appropriate awtm, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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 is called ‘stress relaxation’ and these test methods describe a test method for measuring this relaxation. The values given in parentheses are for information only.