Standard NBN ISO 21561-2:2021

Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — Part 2: FTIR with ATR method (ISO 21561-2:2016)
Status
:
Active
Publication date
:
5/2021
Languages
:
EN
ICS
:
83.060 Rubber
Summary :
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 Fourier Transform Infrared Spectrometry (FTIR) with Attenuated Total Reflection (ATR) method. The styrene content is expressed in mass % relative to the whole polymer. The vinyl, trans and cis contents are expressed in mol % relative to the butadiene content. This method is only applicable to raw rubbers. NOTE 1 Precision as shown in Annex A may not be obtained for S-SBRs containing polystyrene block or styrene content more than 45 mass %. 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.
Preview
Add to cart
EUR 50.00 (excl. VAT)
Select your language
Viewer title
...
The NBN uses cookies to improve your user experience. By continuing to use this site you agree to our use of cookies as described in the NBN privacy statement.
Decline