BS ISO 2782-1:2012

Rubber, vulcanized or thermoplastic. Determination of permeability to gases. Differential-pressure methods | Status: Revised, Superseded, Withdrawn

1 Scope This part of ISO 2782 specifies two methods for the determination of the permeability to gases of vulcanized or thermoplastic rubber under a differential partial pressure. The two methods specified are as follows:

• — a pressure sensor method: for determining the gas transmission rate, gas permeability coefficient, gas diffusion coefficient and gas solubility coefficient;
• — a gas-chromatographic method: for determining the gas transmission rate and gas permeability coefficient.

These methods apply to vulcanized and thermoplastic rubbers of hardness not less than 35 IRHD (international rubber hardness degrees) and to both single gases and mixtures of gases.