BS ISO 4097:2020 pdf download.Rubber, ethylene-propylene-diene (EPDM) — Evaluation procedure
4 Sampling and sample preparation
4.1 Take a laboratory sample of approximately 1,5 kg by the method described in ISO 1795.
4.2 Prepare the test portion in accordance with ISO 1795.
5 Physical and chemical tests on raw rubber
5.1 Mooney viscosity
Determine the Mooney viscosity in accordance with ISO 289-1, on a test portion prepared as indicated in 4.2 (without massing).
If massing is necessary, maintain the mill roll surface temperature at 50 °C ± 5 °C (for rubbers with a low Mooney viscosity, a temperature of 35 °C ± 5 °C can be used). Massing, if used, shall be mentioned in the test report.
Record the result as ML(1+4) at 125 °C unless another test temperature (100 °C or 150 °C) and/or test time (1+8) min has been agreed by the interested parties.
5.2 Volatile matter
Determine the volatile matter content in accordance with ISO 248-1 or ISO 248-2.
5.3 Ash
Determine the ash in accordance with either method A, or method B, or method C of ISO 247-1:2018, or
method A of ISO 247-2:2018.
6 Preparation of test mixes for evaluation
6.1 Standard test formulations
The standard test formulations are given in Table 1, in which:
a) formulation 1 is applicable to non-oil-extended EPDMs with a nominal ethylene content not higher than 67 % by mass;
b) formulation 2 is applicable to non-oil-extended EPDMs with a nominal ethylene content equal to or higher than 67 % by mass;
c) formulation 3 is applicable to non-oil-extended low Mooney viscosity EPDMs;
d) formulation 4 is applicable to oil-extended EPDMs containing 50 or less parts by mass of oil per 100 parts of rubber;
e) formulation 5 is applicable to oil-extended EPDMs containing more than 50 but less than 80 parts by mass of oil per 100 parts of rubber;
f) formulation 6 is applicable to oil-extended EPDMs containing 80 or more parts by mass of oil per 100 parts of rubber.
10 Test report
The test report shall include the following:
a) a reference to this document, i.e. ISO 4097:2020;
b) all details necessary for the identification of the sample;
c) the time and temperature used for the Mooney viscosity determination, and whether a massing
procedure was used (and, if so, the parameters);
d) the method used for the ash determination (method A, or method B or method C of ISO 247-1:2018,
or method A of ISO 247-2:2018);
e) the standard test formulation used;
f) the reference materials used;
g) the mixing procedure used in 6.3;
h) the conditioning times used in 6.3.2.2 j), or 6.3.2.3.1 g) and 6.3.2.3.2 i), or 6.3.2.4.1 g) and
6.3.2.4.2 g), or 6.3.3 j;
i) for Clause 7:
— the type of curemeter used,
— the reference standard, and
— the time for M H or F max ,
— the amplitude of oscillation used for the curemeter test;
j) the vulcanization periods used in Clause 8;
k) any unusual features noted during the determination;
l) any operation not included in this document or in the international standards to which reference is made, as well as any operation regarded as optional;
m) the results and the units in which they have been expressed;
n) the date of the test.BS ISO 4097 pdf download.