標準號：ISO 7781-2008
中文標準名稱：丁苯生膠.皂類和有機酸含量的測定
英文標準名稱：Styrene-butadiene rubber, raw - Determination of soap and organic-acid content
標準類型：G34
發布日期：2008/4/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G34
國際標準分類號：83.040.10
引用標準：ISO 385;ISO 648;ISO 1042;ISO 1795;ISO 4799
適用范圍：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.