ISO TS 289-4:2017 pdf free

ISO TS 289-4:2017 pdf free.Rubber, unvulcanized一Determinations using a shearing-disc viscometer
This document specifies a method of use of a shearing disc viscometer for measuring the Mooney stress-relaxation rate (MSR) of uncompounded or compounded, unvulcanized rubbers, characterizing the elastic response of those materials next to the viscous response as measured by the Mooney viscosity.
The intended use of this document is on quality control measurements.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 289-1:2015, Rubber, unvulcanized 一Determinations using a shearing-disc viscometer一Part 1:Determination of Mooney viscosity
ISO 18899:2013, Rubber一Guide to the calibration of test equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一IEC Electropedia: available at http://www.electropedia.org/
一ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Mooney stress-relaxation rate
absolute value of the slope of the linear regression line of the log(torque) versus log(time) plot over a specified time interval after stopping the rotor at the end of a Mooney viscosity measurement
Note 1 to entry: The MSR measurement is a stress relaxation measurement which covers a broad spectrum of relaxation times and is sensitive to polymer structure at a specified relaxation time interval.
4 Principle
The test consists of determining the decay of the Mooney torque immediately after the determination of the Mooney viscosity. After abruptly stopping the rotor at the end of the Mooney viscosity measurement,the decrease in torque is recorded as a function of time. The rate of change of the torque is evaluated over a short time interval assuming power law validity, in accordance with theoretical predictions[16].ISO TS 289-4 pdf download.