BS ISO 14932:2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Titration method A
5 Titration method B
6 Titration method C
7 Determination of the assay of
  2,5-dimethyl-2,5-di(tert-butylperoxy)hexane
8 Precision
9 Test report
Annex A (informative) - Method to determine the content
        of peroxyketal
Annex B (normative) - Method to determine the content of
        tert-butyl hydroperoxide
Annex C (informative) - Method to determine the content
        of diacyl peroxides
Annex D (normative) - Sample preparation for the
        determination of peroxide in peroxide masterbatches
Annex E (normative) - Sample preparation for the
        determination of alkyl-aralkyl peroxide on polymers
Annex F (informative) - Precision
Bibliography

Describes four methods for the determination of the content of the following groups of organic peroxides used as rubber vulcanizing agents.

This International Standard specifies four methods for the determination of the content of the following groups of organic peroxides used as rubber vulcanizing agents. There are three titration methods and one using capillary gas-chromatography.

1.1 Titration method A for group a) peroxyketals

• DTBPC: 1,1-Di(tert-butylperoxy)cyclohexane;

• DBPMC: 1,1-Di(tert-butylperoxy)-2-methylcyclohexane;

• DBPTC: 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcylcohexane;

• DBPB: 2,2-Di(tert-butylperoxy)butane;

• BPV: Butyl -4,4-di(tert-butylperoxy)valerate.

1.2 Titration method B for group b) diacyl peroxides

• Dibenzoyl peroxide;

• Di(2,4-dichlorobenzoyl) peroxide;

• Di(4-methylbenzoyl) peroxide.

1.3 Titration method C for group c) diaralkyl and alkyl-aralkyl peroxides

• Di(tert-butylperoxyisopropyl)benzene;

• Dicumyl peroxide;

• tert-Butyl cumyl peroxide.

1.4 Capillary gas-chromatography for dialkyl peroxides

• 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane.