标准名称

ISO 182-1 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

ISO 182-1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

适用范围

Scope

Intended primarily as a simple and rapid quality-control test during the manufacture and conversion of PVC compounds .Suitable or 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_s. Together with ISO 182-2, replaces and cancels ISO Recommendation R 182:1970.

相关标准

GB/T 2917.1以氯乙烯均聚和共聚物为主的共混物及制品在高温时放出氯化氢和任何其他酸性产物的测定 刚果红法/Determination of compounds and products based on vingl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures –Congo red method