BS 7164-14-1996 生橡胶和硫化橡胶的化学试验.炭黑含量的测定方法

标准号：BS 7164-14-1996
中文标准名称：生橡胶和硫化橡胶的化学试验.炭黑含量的测定方法
英文标准名称：Chemical tests for raw and vulcanized rubber - Methods for determination of carbon black content
标准类型：G34
发布日期：1996/5/15 12:00:00
实施日期：1996/5/15 12:00:00
中国标准分类号：G34
国际标准分类号：83.060
适用范围：1 This International Standard specifies a pyrolytic method (A) and two chemical degradation methods (B and C) for the determination of the carbon black con-tent of rubber. 2 Method A is preferred and should be used for the following polymers, except when certain com-pounding 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 pre-sent: — polyisoprene, natural or synthetic; — polybutadiene; — styrene-butadiene copolymers; — butyl rubber; — acrylate rubber; — ethylene-propylene copolymer; — ethytene-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 min-eral fillers, e.g. alumina or calcium carbonate, are present which decompose or dehydrate, or form vol-atile 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). 3 Method B is chiefly intended to be used with samples not amenable to the pyrolytic method A, al-though it can be used for all samples based on un-saturated rubbers except for isobutylene-isoprene copolymers. 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.