 |
| Purchase Information |
| Use this form to request purchase information on ORG online subscriptions. |
|
|
Document ASTM D 1646 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
ASTM D 1646 Document Information:
Title
Standard Test Methods for Rubber—Viscosity, Stress Relaxation, and Pre-Vulcanization Characteristics (Mooney Viscometer)
ASTM International
Publication Date:
Nov 1, 2007
Scope:
These test methods cover procedures for measuring a property
called Mooney viscosity. Mooney viscosity is defined as the
shearing torque resisting rotation of a cylindrical metal disk (or
rotor) embedded in rubber within a cylindrical cavity. The
dimensions of the shearing disk viscometer, test temperatures, and
procedures for determining Mooney viscosity are defined in these
test methods.
When disk rotation is abruptly stopped, the torque or stress on
the rotor decreases at some rate depending on the rubber being
tested and the temperature of the test. This is called "stress
relaxation" and these test methods describe a test method for
measuring this relaxation.
NOTE 1—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.
Stress relaxation is also a function of the test configuration and
for these test methods the results are unique to the Mooney
viscometer.
When compounded rubber is placed in the Mooney viscometer at a
temperature at which vulcanization may occur, the vulcanization
reaction produces an increase in torque. These test methods include
procedures for measuring the initial rate of rubber
vulcanization.
ISO 289 Parts 1 and 2 also describes the determination of Mooney
viscosity and pre-vulcanization characteristics. In addition to a
few insignificant differences there are major technical differences
between ISO 289 and this test method in that ISO 289 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.
The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. 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.
Keywords:
- curing characteristics
- Mooney
- stress relaxation
- viscosity
- vulcanization characteristics
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
