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  • BSI
    BS 7164-14:1996, ISO 1408:1995 Chemical tests for raw and vulcanized rubber - Methods for determination of carbon black content
    Edition: 1996
    $282.26
    / user per year

Description of BS 7164-14:1996 1996

1.1 This International Standard specifies a pyrolytic method (A) and two chemical degradation methods (B and C) for the determination of the carbon black content of rubber.

1.2 Method A is preferred and should be used for the following polymers, except when certain compounding materials such as lead and cobalt salts, graphitic carbon blacks, phenolic and other resins, bitumen, or cellulose, etc., which cause the formation of a carbonaceous residue during pyrolysis, are present:

  • polyisoprene, natural or synthetic;
  • polybutadiene;
  • styrene-butadiene copolymers;
  • butyl rubber;
  • acrylate rubber;
  • ethylene-propylene copolymer;
  • ethylene-propylene terpolymer;
  • polyethers;
  • polyethylene-derived polymers;
  • silicone rubbers;
  • fluorosilicone rubbers;
  • chlorosulfonated polyethylenes containing less than 30 % (m/m) of chlorine.

The precision of this method may be affected if mineral fillers, e.g. alumina or calcium carbonate, are present which decompose or dehydrate, or form volatile halides in the case of halogenated polymers, at the pyrolysis temperature.

The method cannot be used for either chloroprene rubbers or butadiene-nitrile rubbers having an acrylic acid nitrile content greater than 30 % (m/m).

1.3 Method B is chiefly intended to be used with samples not amenable to the pyrolytic method A, although it can be used for all samples based on unsaturated rubbers except for isobutylene-isoprene copolymers.

1.4 Method C is relatively hazardous and should be used only for the analysis of samples based on isobutylene-isoprene copolymers and ethylene-propylene copolymers and related terpolymers when methods A and B fail.





About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.

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