ISO 4097:2020 pdf download Rubber, ethylene-propylene-diene (EPDM) — Evaluation procedure
1 Scope
This document specifies:
– the physical and chemical tests on raw rubbers;
the standard materials,standard test formulations,equipment, and processing methods forevaluatingthe vulcanization characteristics of ethylene-propylene-diene rubbers(EPDM), includingoil-extended types.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.Forundated references, the latest edition of the referenced document (including any amendments) applies.
ISO 37,Rubber, vulcanized or thermoplastic —Determination of tensile stress-strain properties
ISO 247-1:2018,Rubber — Determination of ash — Part 1:Combustion method
ISO 247-2:2018,Rubber — Determination of ash — Part 2:Thermogravimetric analysis (TGA)
ISO 248-1,Rubber, raw -Determination of volatile-matter content — Part 1: Hot-mill method andoven method
ISO 248-2,Rubber, raw —Determination of volatile-matter content — Part 2:Thermogravimetric methodsusing an automatic analyser with an infrared drying unit
ISO 289-1,Rubber，unvulcanized – Determinations using a shearing-disc viscometer — Part 1:Determination of Mooney viscosity
ISo 1795,Rubber, raw natural and raw synthetic —Sampling and further preparative proceduresISo 2393,Rubber test mixes —Preparation, mixing and vulcanization —Equipment and procedures
ISO 6502-1，Rubber ― Measurement of vulcanization characteristics using curemeters — Part 1:lntroduction
ISO 6502-2,Rubber —Measurement of vulcanization characteristics using curemeters—Part2: Oscillatingdisc curemeter
ISO23529,Rubber —General procedures for preparing and conditioning test piecesfor physical test methods
3Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
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).
lf massing is necessary, maintain the mill roll surface temperature at 50 °C± 5 °C(for rubbers with alow Mooney viscosity, a temperature of 35 C± 5°C can be used).Massing, if used, shall be mentionedin the test report.
Record the result as ML(1+4) at 125 °C unless another test temperature (100 °C or 150°C)and/or testtime (1+8) min has been agreed by the interested parties.
5.2Volatile matter
Determine the volatile matter content in accordance with ISO 248-1 or lSO 248-2.
5.3Ash
Determine the ash in accordance with either method A,or method B, or method C of ISO 247-1:2018,ormethod A of ISO 247-2:2018.
6 Preparation of test mixes for evaluation
6.1Standard 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;
cformulation 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.
The materials used shall be national or international standard reference materials unless no standard reference material is available in which case the materials to be used shall be agreed between the interested parties.
6.2 Equipment and procedure
Equipment and procedure for the preparation, mixing, and vulcanization shall be in accordance with ISO 2393.
6.3 Mixing procedures
6.3.1 General
Four alternative mixing procedures are specified.
— Method A1: single stage mixing with laboratory internal mixer (LIM) which is the preferred method.
— Method A2: two-stage mixing with LIM.
— Method A3: two-stage mixing using a LIM for initial mixing and mill mixing for final mixing.
— Method B: mill mixing.ISO 4097:2020 pdf download