Overview
ISO 24454:2008 - Rubber - Acquisition and presentation of comparable multi-point data provides standardized procedures for acquiring and presenting multi-point test data for selected properties of rubber compounds. The standard defines how to generate property data as a function of key variables (time, temperature and environmental effects) so results from different suppliers and laboratories are directly comparable. Annex A gives guidance on interpretation of results.
Key topics and technical requirements
- Scope and purpose
- Produce comparable multi-point datasets to support material specification sheets and side-by-side supplier comparisons.
- Test piece preparation & conditioning
- Follow ISO 2393 for mixing/moulding; document equipment and cycles.
- Timing windows: mixing→moulding (24 h to 1 week); moulding→conditioning (16 h to 4 weeks).
- Standard laboratory conditions: (23 ± 2) °C and 50 % RH (note guidance if using 27 °C).
- Main variables
- Temperature, time and environmental agents (liquids, UV, ozone, mechanical cycling).
- Use integral multiples of 10 °C for series of temperatures, replacing 20 °C with 23 °C.
- Mechanical and viscoelastic testing
- Tensile stress–strain: ISO 37, Type 1/1A dumbbells, 500 mm/min, minimum six temperatures (one = 23 °C).
- Dynamic properties: ISO 4664-1 in shear mode (DMTA recommended); frequencies at 0.1, 1, 10 and 100 Hz; strain amplitude ±2 %, zero prestrain; minimum six temperatures.
- Stress relaxation: ISO 3384 Method A, measure after 167 h at a minimum of four temperatures.
- Creep: ISO 8013, measure creep increment after 167 h; choose stress to give 20 % initial strain.
- Degradation and environmental tests
- Heat ageing and lifetime estimation (ISO 11346) to derive T(20000) using Arrhenius or WLF processing.
- Resistance to liquids (ISO 1817), accelerated weathering (ISO 4665 - xenon arc), ozone exposure (ISO 1431-1), and fatigue (ISO 6943).
- Presentation
- Report test conditions, number of specimens (as required by test methods) and processed multi-point results for direct comparison.
Practical applications and users
- Enables consistent material specification sheets across suppliers.
- Useful for: rubber compounders, independent test laboratories, OEMs, procurement engineers, R&D teams, quality assurance, and regulatory bodies.
- Typical uses: material selection, lifetime estimation, performance benchmarking, failure analysis and contractual specifications.
Related standards (selected)
Keywords: ISO 24454:2008, rubber multi-point data, tensile stress-strain, viscoelastic properties, DMTA, stress relaxation, creep, accelerated weathering, material specification sheets.
