ISO 21561-2:2024
Current
The latest, up-to-date edition.
Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — Part 2: Fourier transform infrared spectrometry (FTIR) with attenuated total reflection (ATR) method
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15-08-2024
This document specifies procedures for the quantitative determination of the microstructure of the butadiene portion and the content of styrene in solution-polymerized SBR (S-SBR) by Fourier transform infrared spectrometry (FTIR) with attenuated total reflection (ATR) method. The styrene content is expressed in mass fraction relative to the S-SBR. The contents of three microstructure types, i.e. vinyl, trans and cis, are expressed in mol fraction relative to the butadiene portion in the S-SBR. This method is only applicable to raw rubbers.
NOTE1 Precision as shown in AnnexA is not always possible to obtain for S-SBRs containing polystyrene block or styrene content more than 45%.
NOTE2 Only “vinyl”, “trans” and “cis”, are used in this document. 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.
| Committee |
ISO/TC 45/SC 3
|
| DocumentType |
Standard
|
| Pages |
15
|
| PublisherName |
International Organization for Standardization
|
| Status |
Current
|
| Supersedes |
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