ISO 182-1-1990 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1部分:刚果红法

标准号：ISO 182-1-1990
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1部分:刚果红法
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 1: Congo red 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：Intended primarily as a simple and rapid quality-control test during the manufacture and conversion of PVC compounds. Suitable for coloured compounds. Is not recommended for compounds in the form of dry blends. The determination is carried out on a sample of the PVC compound which is maintained at an agreed temperature in still air until the colour of a Congo red paper held above it changes from red to blue. If universal indicator paper is used, the colour change is that corresponding to pH 3. The time required for the colour change is taken to be the stability time, t