ISO 247-2006 橡胶.灰分的测定

标准号：ISO 247-2006
中文标准名称：橡胶.灰分的测定
英文标准名称：Rubber - Determination of ash
标准类型：G40
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G40
国际标准分类号：83.060
引用标准：ISO 248;ISO 1629;ISO 1795
适用范围：This International Standard specifies two 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 shall not be used for the determination of ash from compounded or vulcanized rubbers containing chlorine, bromine or iodine.— Method B shall be used for compounded or vulcanized rubbers containing chlorine, bromine or iodine. It shall not be used for uncompounded rubbers.— Lithium and fluorine compounds may 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 International Standard 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.The two methods of ashing do not give identical results in all cases, and it is necessary to state in the test report the method of ashing employed.