標準號：BS 7164-14-1996
中文標準名稱：生橡膠和硫化橡膠的化學試驗.炭黑含量的測定方法
英文標準名稱：Chemical tests for raw and vulcanized rubber - Methods for determination of carbon black content
標準類型：G34
發(fā)布日期：1996/5/15 12:00:00
實施日期：1996/5/15 12:00:00
中國標準分類號：G34
國際標準分類號：83.060
適用范圍：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.