ISO 7781-2008 丁苯生胶.皂类和有机酸含量的测定

标准号：ISO 7781-2008
中文标准名称：丁苯生胶.皂类和有机酸含量的测定
英文标准名称：Styrene-butadiene rubber, raw - Determination of soap and organic-acid content
标准类型：G34
发布日期：2008/4/1 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G34
国际标准分类号：83.040.10
引用标准：ISO 385;ISO 648;ISO 1042;ISO 1795;ISO 4799
适用范围：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.