ISO 4664-1:2022

Overview

ISO 4664-1:2022 - "Rubber, vulcanized or thermoplastic - Determination of dynamic properties - Part 1: General guidance" provides structured guidance for measuring the dynamic properties of vulcanized and thermoplastic rubbers. The standard covers both free- and forced-vibration methods applied to materials and finished products, explains viscoelastic concepts, and sets out the key parameters and conditioning procedures required for reliable dynamic testing. It explicitly excludes rebound resilience tests and cyclic tests whose primary objective is fatigue.

Key topics and technical requirements

The standard organizes guidance around terminology, principles, and practical test considerations. Major technical topics include:

• Terms, definitions and symbols for periodic deformation, hysteresis loops, mean stress/strain, and dynamic amplitudes.
• Viscoelasticity fundamentals and the use of dynamic test data to derive material parameters.
• Dynamic measurement methods:
  • Forced vibration - non-resonant methods
  • Forced resonant vibration methods
  • Free-vibration methods
• Key dynamic parameters such as storage shear modulus (G′), loss shear modulus (G″), spring constant, energy and power loss, and methods to express results (waveform, hysteresis loop, stress–strain relations).
• Test parameter dependence, including frequency–temperature interdependence (time–temperature superposition) and strain-amplitude effects (e.g., Payne effect).
• Specimen preparation and conditioning: storage, temperature control, mechanical conditioning, shapes, dimensions and number of test pieces (see ISO 23529 for specimen preparation).
• Interpretation guidance, including assessment of linear vs nonlinear response and calculation examples (informative annexes on nonlinearity and time–temperature superposition).

Practical applications and who uses ISO 4664-1:2022

ISO 4664-1 is intended for engineers, materials scientists, and testing professionals who need consistent, comparable dynamic property data for rubber compounds and products. Typical users and applications:

• Quality control and acceptance testing of rubber components (seals, mounts, gaskets, vibration isolators).
• Research & development for compound formulation and filler effects (e.g., Payne effect).
• Material selection for dynamic applications requiring damping or stiffness characterization.
• Test laboratories and OEMs requiring standardized methods to report storage and loss modulus, hysteresis energy loss, and frequency/temperature behavior.

Related standards

• ISO 23529 - Rubber: general procedures for preparing and conditioning test pieces (referenced for specimen preparation).
• Other parts of the ISO 4664 series provide more detailed procedures for specific test methods.

Keywords: ISO 4664-1:2022, dynamic properties, rubber testing, viscoelasticity, forced vibration, free vibration, storage modulus, loss modulus, time–temperature superposition, Payne effect.