ISO 248:2005 生胶 挥发份的测定

标准编号：ISO 248:2005

中文名称：生胶 挥发份的测定

英文名称：Rubber, raw — Determination of volatile-matter content

发布日期：2005-06

标准范围

ISO 248:2005规定了两种测定生胶中水分和其他挥发物含量的方法，即热磨法和烘箱法。这些方法适用于测定ISO 1629中列出的R族橡胶中的挥发性物质含量，这些橡胶是具有不饱和碳链的橡胶，例如天然橡胶和至少部分源自二烯烃的合成橡胶。ISO 248:2005也可能适用于其他橡胶，但在这些情况下，有必要证明质量的变化仅是由于原始挥发性物质的损失，而不是橡胶的降解。热轧法不适用于天然和合成异戊二烯橡胶，或难以在热轧机上处理的橡胶，或粉末状或片状橡胶。

ISO 248:2005 specifies two methods, a hot-mill method and an oven method, for the determination of moisture and other volatile-matter content in raw rubbers.These methods are applicable to the determination of the volatile-matter content in the R-group of rubbers listed in ISO 1629 which are rubbers having an unsaturated carbon chain, for example, natural rubber and synthetic rubbers derived at least partly from diolefins.ISO 248:2005 may also be applicable to other rubbers, but in these cases it is necessary to prove that the change in mass is due solely to loss of original volatile matter and not to rubber degradation.The hot-mill method is not applicable to natural and synthetic isoprene rubbers or to rubbers too difficult to handle on a hot mill or to rubbers in powdered or chip form.

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