ISO 7781:2008 苯乙烯-丁二烯生胶 皂和有机酸含量的测定

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

ISO 7781:2008规定了生料丁苯橡胶（SBR）中肥皂和有机酸含量的测定方法。方法A是使用指示剂的滴定法。方法B是使用自动滴定仪或pH计的滴定方法。这些方法取决于通过特定溶剂从橡胶中提取有机酸和肥皂。因此，在实际操作中，可以方便地测定同一溶剂提取物中不同部分的有机酸和肥皂含量。由于橡胶中的肥皂和有机酸不是单一化合物，因此该方法仅给出肥皂和有机酸含量的近似值。

ISO 7781:2008 specifies methods for the determination of the soap and organic-acid content of raw styrene-butadiene rubber (SBR). Method A is the titration method using indicator reagent. Method B is the titration 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 a specified solvent. In practice, therefore, it is convenient to determine both organic-acid and soap contents on separate portions of the same solvent extract. Since the soaps and organic acids present in the rubber are not single chemical compounds, the method gives only an approximate value for the soap and organic-acid content.

标准预览图