ISO 182-2-1990 塑料 基于氯乙烯共聚物、均聚物的化合物及产物在高温下析出氯化氢和其他酸性产物的趋势测定 第2部分:pH值法

标准号：ISO 182-2-1990
中文标准名称：塑料 基于氯乙烯共聚物、均聚物的化合物及产物在高温下析出氯化氢和其他酸性产物的趋势测定 第2部分:pH值法
英文标准名称：Plastics; determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures; part 2: pH method
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1990/12/15 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.20
适用范围：May be used as a quality-control test during manufacture and conversion of PVC compounds and for coloured compounds. Is not recommended for compounds in the form of dry blends. Defines the stability time. The principle consists in exposing a sample of the material at an agreed temperature in a gas stream, followed by absorption of the hydrogen chloride evolved in a 0.1 mol/l solution of sodium chloride. The amount of hydrogen chloride evolved is measured by recording the change in pH of the sodium chloride solution. Figures show the general arrangement of apparatus and details of the dehydrochlorination cell. Together with three other parts of ISO 182, cancels and replaces ISO Recommendation R 182:1970.