ISO 289-3:2015 pdf download – Rubber, unvulcanized一Determinations using a shearing- disc viscometer – Part 3: Determination of the Delta Mooney value for non- pigmented, oil-extended emulsion-polymerized SBR.
8 Test temperature The test temperature shall be 100 °C土0,5 °C, this being the temperature of the closed dies with the rotor in place and the cavity empty. 9 Procedure The test shall be conducted according to the procedure described in ISO 289-1, using the large rotor, a preheating time of 1 min and a running time of either 7 min or 15 min. If the viscosity has not been recorded continuously, plot the observed Mooney viscosity values as specified in ISO 289-1. NOTE An automatic recorder is strongly recommended. 10 Calculation and expression of results The Delta Mooney A1 value shall be determined as the difference between the Mooney viscosities recorded at running times of 15 min and 1 min. The Delta Mooney A2 value shall be determined as the difference between the Mooney viscosities recorded at running times of 7 min and 1 min. The Delta Mooney A3 value shall be determined as the difference between the Mooney viscosities recorded at running times of 15 min and 1,5 min. The Delta Mooney B value shall be determined as the difference between the minimum and maximum Mooney viscosities (see Figure 1]. NOTE For Delta Mooney A, lower (in most cases, more negative) values are indicative of easier-processing rubbers. For Delta Mooney B, lower values also indicate easier processing.
11 Test report The test report shall include the following information: S a] all details necessary for complete identification of the rubber tested, including whether the test sample was compacted or not; b] full reference to the test method used, reference to this part of ISO 289 (i.e. ISO 289-3); c) test detail: 1) model of viscometer used and name of the manufacturer; 2) details of any procedures not specified in this part of ISO 289; 3) details of any procedure not included in this part of ISO 289, as well as any operation regarded as optional; d] test results: 1) Delta Mooney A1, A2, A3 and/or B value; e) date[s) of the test.