标准编号：ISO 7781:2008
中文名称：苯乙烯-丁二烯生胶 皂和有机酸含量的测定
英文名称：Styrene-butadiene rubber, raw — Determination of soap and organic-acid content
发布日期：2008-04
标准范围
This International Standard specifies methods for the determination of the soap and organic-acid content ofraw styrene-butadiene rubber (SBR). Method A is the titration method using indicator reagent. Method B is thetitration method using an autotitrator or pH-meter.The methods depend on the extraction of the organic acids and soaps from the rubber by means of aspecified solvent. In practice, therefore, it is convenient to determine both organic-acid and soap contents onseparate portions of the same solvent extract. Since the soaps and organic acids present in the rubber are notsingle chemical compounds, the method gives only an approximate value for the soap and organic-acidcontent.
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