ISO 182-2:1990 塑料.化合物和氯乙烯共聚物、均聚物在高温中分解出氯化氢和其它酸性物的趋势测定.第2部分：pH值法

标准编号：ISO 182-2:1990

中文名称：塑料.化合物和氯乙烯共聚物、均聚物在高温中分解出氯化氢和其它酸性物的趋势测定.第2部分：pH值法

英文名称：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 temperature

发布日期：1990-12

标准范围

可用于PVC化合物和有色化合物生产和转化过程中的质量控制测试。不建议用于干燥混合物形式的化合物。定义稳定时间。其原理是将材料样品暴露在商定温度的气流中，然后吸收在0.1 mol/l氯化钠溶液中析出的氯化氢。通过记录氯化钠溶液pH值的变化来测量放出的氯化氢量。图中显示了设备的总体布置和脱氯化氢池的细节。与ISO 182的其他三部分一起，取消并取代ISO建议R 182:1970。

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.

标准预览图