Styrene-butadiene rubber (SBR) - Determination of the microstructure of solution-polymerized SBR - Part 1: 1H-NMR and IR with cast-film method
|Publication Date:||15 July 2015|
|ICS Code (Rubber):||83.060|
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
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;
- trans: 1,4-trans unit, 1,4-trans bond, trans-1,4 unit or trans1,4 bond;
cis: 1,4-cis unit, 1,4-cis bond, cis-1,4 unit or cis-1,4 bond.