ISO 21561-1:2015由国际标准化组织 IX-ISO 发布于 2015-07。
ISO 21561-1:2015在国际标准分类中归属于: 83.060 橡胶。
ISO 21561-1:2015 苯乙烯-丁二烯橡胶 (SBR). 溶聚苯乙烯-丁二烯橡胶微观结构的测定. 第1部分: 带有铸膜法的1H-NMR和IR的最新版本是哪一版?
最新版本是 ISO 21561-1:2015 。
This part of ISO 21561 specifies procedures for the quantitative determination of the microstructure of the butadiene and the content of styrene in solution-polymerized SBR (S-SBR) by 1H-NMR spectrometry as an absolute method and by IR spectrometry as a relative method. The styrene content is expressed in mass % relative to the whole polymer. The trans, cis and vinyl contents are expressed in mol % relative to the butadiene. These methods are applicable only for raw rubber. NOTE 1 IR spectrometry can also give absolute values of microstructure by calibration with S-SBRs of known absolute microstructure obtained by 1H-NMR spectrometry. NOTE 2 Only “vinyl”, “trans” and “cis” are used in this part of ISO 21561. However, the expression of vinyl, trans and cis mean as follows in general: — vinyl: vinyl unit, vinyl bond, 1,2-unit, 1,2-bond, 1,2-vinyl-unit or 1,2-vinyl-bond; — cis: 1,4-cis unit, 1,4-cis bond, cis-1,4 unit or cis-1,4 bond. — trans: 1,4-trans unit, 1,4-trans bond, trans-1,4 unit or trans1,4 bond;
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