A measurement of the residual acrylonitrile in nitrile rubbers (NBR), styrene-acrylonitrile copolymers or ABS terpolymers will determine the polymer's suitability for various applications.

Under optimum conditions, the minimum level of detection of RAN in NBR, SAN, or ABS terpolymers is approximately 50 ppb.

1. Scope

1.1 This test method covers the determination of the residual acrylonitrile (RAN) content in nitrile-butadiene rubbers (NBR), styrene-acrylonitrile (SAN) copolymers, and rubber-modified acrylonitrile-butadiene-styrene (ABS) resins.

1.2 Any components that can generate acrylonitrile in the headspace procedure will constitute an interference. The presence of 3-hydroxypropionitrile in latices limits this procedure to dry rubbers and resins.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in 6.3 and 6.4.

Note 1—There is no known ISO equivalent to this test method.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

Keywords

headspace-gas chromatography; nitrile rubber; residual acrylonitrile; styrene-acrylonitrile copolymers; Acrylonitrile-butadiene-styrene (ABS); Acrylonitrile content; Capillary gas chromatography; Gas chromatography (GC)--plastics; Headspace gas chromatography; Nitrile-butadiene rubber (NBR); Residual acrylonitrile (RAN); Rubber property analysis; Styrene-acrylnitrile (SAN) materials;

ICS Code

ICS Number Code 83.060 (Rubber)

Citing ASTM Standards

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