IS 16848 : Part 2 : 2024 Rubber - Methods of Test - Part 2 Determination of Styrene Content - Nitration Method
(Superseding IS 14789 : 2000/ISO 5478 : 1990)
1 SCOPE
1.1 This standard (Part 2) specifies a method for the determination of the styrene content of all types of styrene-butadiene rubber (SBR), including oilextended types.
1.2 The method is applicable to styrene-butadiene rubber reinforced with styrene homopolymer, to give the total styrene content.
1.3 The method is also applicable for determining the styrene in block copolymers containing up to 50 percent (m/m) of styrene.
1.4 It is applicable to vulcanizates of mixtures of SBR with other polymers (NR, BR, IR and CR) and is considered a method for estimating the SBR content of mixtures, if the styrene content of the SBR is known and provided that no other styrenecontaining materials are present.
1.5 Any other non-extractable aromatic material which absorbs in the specified spectral region will interfere with this method.
1.6 The procedure may give low results when the content of mineral filters insoluble in nitric acid exceeds 5 percent (m/m).
2 REFERENCES
The standards listed in Annex A contain provisions which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards.
| IS No./Other Standards | Title |
| IS 3660 (Part 9) : 2016/ISO 1407 : 2011 | Methods of test for natural rubber: Part 9 determination of solvent extract [NR : 10] (second revision) |
| IS 5165 : 2017/ISO 383 : 1976 | Laboratory glassware - Interchangeable conical ground joints (first revision) |
| ISO 4661-2 : 2018 | Rubber vulcanized - Preparation of samples and test pieces - Part 2: Chemical tests |
| IS 5599 : 1999 | Rubber - Raw, natural and synthetic - Methods for sampling and sample preparation (first revision) |
| ISO 2453 : 2020 | Rubber, raw styrenebutadiene, emulsionpolymerized - Determination of bound styrene content - Refractive index method |