标准摘要
[中文适用范围]： 本标准规定了从生胶、混炼胶和硫化胶中测定灰分的三种方法。该方法适用于ISO 1629中定义的M、N、O、R和U族别的生胶、混炼胶或硫化胶，但存在以下限制： ——方法A不适用于含氯、溴或碘的混炼胶或硫化胶的灰分测定； ——方法B适用于含氯、溴或碘的混炼胶或硫化胶的灰分测定，但不适用于生胶； ——方法C适用于不含氯、溴或碘的生胶、混炼胶或硫化胶的灰分测定，该方法通过将试样用无灰滤纸包裹进行测定； ——锂和氟化合物可能与硅质坩埚反应生成挥发性化合物，导致灰分测定结果偏低。因此，测定含氟橡胶或锂聚合橡胶的灰分时，应使用铂坩埚。 本文件不涉及对灰分结果所反映的化合物或硫化胶无机化学成分的解释，该责任由分析人员承担，且分析人员需了解橡胶添加剂在高温下的行为特性。 [外文原描述]： This document specifies three methods for the determination of ash from raw rubbers, compounded rubbers and vulcanizates. The methods are applicable to raw, compounded or vulcanized rubbers of the M, N, O, R and U families described in ISO 1629, except that: — Method A is not used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine; — Method B is used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. It shall not be used for uncompounded rubbers; — Method C is intended to be used for the determination of ash from raw, compounded or vulcanized rubber not containing chlorine, bromine or iodine by wrapping the test portion in ashless filter paper; — Lithium and fluorine compounds might react with silica crucibles to form volatile compounds, giving low ash results. Platinum crucibles shall therefore be used for ashing fluorine-containing and lithium-polymerized rubbers. This document does not cover the interpretation of the ash results as to the inorganic chemical content of a compound or vulcanizate. This is the responsibility of the analyst, who has to be aware of the behaviour of rubber additives at elevated temperatures.
英文名称Rubber — Determination of ash — Part 1: Combustion method