ASTM D3189-06(R2021) pdf free download

ASTM D3189-06(R2021) pdf free download.Standard Test Methods for Rubber—Evaluation of Solution BR (Polybutadiene Rubber)
1. Scope
1.1 These test methods cover the standard materials, test formula, mixing procedures, and test methods for evaluation of butadiene rubber (BR) made by polymerization in solution. 1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.3 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
6. Mixing Procedures
6.1 The following four mixing procedures are offered: 6.1.1 Test Method A—Internal Mixer for Initial and Final Mix, 6.1.2 Test Method B—Internal Mixer Initial Mix with Final Mill Mix,6.1.3 Test Method C—Mill Mix, and 6.1.4 Test Method D—Miniature Internal Mixer Mix. N OTE 2—The compound may be prepared either on a mill or in an internal mixer or in a miniature internal mixer although slightly different results may be obtained. N OTE 3—Since the mill handling characteristics of the solution polyb- utadiene rubber are somewhat more difficult than for other polymers; the use of one of the internal mixer procedures is recommended (Test Method A, B, or D). The mill procedure (Test Method C) may be used provided good carbon black dispersion is obtained. 6.2 Test Method A—Internal Mixer for Initial and Final Mix—See Table 2 and Table 3. 6.2.1 For general mixing procedure, refer to Practice D3182. 6.2.1.1 If required, cut samples from the batch to allow testing ofcompound viscosity and processability in accordance with Test Methods D1646 or D6204, and vulcanization char- acteristics in accordance with Test Methods D2084 or D5289. 6.2.1.2 If tensile stress strain tests are required, sheet off to a finished thickness of approximately 2.2 mm (0.087 in.) and condition the compound according to Practice D3182. 6.3 Test Method B—Internal Mixer for Initial Mix With Final Mill Mix: 6.3.1 For general mixing procedure refer to Practice D3182. 6.3.2 Mixing Cycle—Initial Mix: 6.3.2.1 Prepare the initial mix in accordance with the procedure outlined in Table 2. 6.3.3 Final Mix—See Table 4. 6.3.3.1 After mixing according to Table 4, measure and record the batch mass. Ifit differs from the theoretical value by more than 0.5 %, discard the batch. 6.3.3.2 If required, cut samples from the batch to allow testing ofcompound viscosity and processability in accordance with Test Methods D1646 or D6204, and vulcanization char- acteristics in accordance with Test Methods D2084 or D5289.6.3.3.3 If tensile stress strain tests are required, sheet off to a finished thickness of approximately 2.2 mm (0.087 in.) and condition the compound according to Practice D3182. 6.4 Test Method C—Mill Procedure: 6.4.1 For general mixing procedure, refer to Practice D3182. 6.4.1.1 Pre-blend the zinc oxide and stearic acid in a single container. 6.4.1.2 To simplify the addition of the oil, prepare an oil-carbon black paste as follows: Add the oil to a 100 mL beaker. While stirring the oil with a spatula, slowly add 30 g of the carbon black until a paste is formed. 6.4.1.3 Adjust the mill cooling conditions to maintain a temperature of 35 6 5°C throughout the mixing operations. Adjust the mill openings as necessary to maintain a good rolling bank at the nip of the rolls during the mixing. 6.4.2 Mixing Cycle—See Table 5. 6.4.2.1 After mixing according to Table 5, measure and record the batch mass. Ifit differs from the theoretical value by more than 0.5 %, discard the batch. 6.4.2.2 If required, cut samples from the batch to allow testing ofcompound viscosity and processability in accordance with Test Methods D1646 or D6204, and vulcanization char- acteristics in accordance with Test Methods D2084 or D5289.