标准编号：ISO 5478:2006
中文名称：橡胶 苯乙烯含量的测定 硝化法
英文名称：Rubber — Determination of styrene content — Nitration method
发布日期：2006-10
标准范围
This International Standard specifies a method for the determination of the styrene content of all types ofstyrene-butadiene rubber (SBR), including oil-extended types.The method is applicable to styrene-butadiene rubbers reinforced with styrene homopolymer, to give the totalstyrene content. The method is also applicable for determining the styrene in block copolymers containing upto 50 % (by mass) of styrene.It is applicable to vulcanizates of mixtures of SBR with other polymers (NR, BR, IR and CR) and is considereda method for estimating the SBR content of mixtures, if the styrene content of the SBR is known and providedthat no other styrene-containing materials are present.Any other non-extractable aromatic material which absorbs in the specified spectral region will interfere withthis method.The procedure may give low results when the content of mineral fillers insoluble in nitric acid exceeds 5 % (by mass).
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