標準號：ISO 5478-2006
中文標準名稱：橡膠.苯乙烯含量的測定.硝化法
英文標準名稱：Rubber - Determination of styrene content - Nitration method
標準類型：G34
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G34
國際標準分類號：83.060
適用范圍：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).