標準號：ISO 182-1-1990
中文標準名稱：塑料 基于氯乙烯共聚物、均聚物的化合物及產(chǎn)物在高溫下析出氯化氫和其他酸性產(chǎn)物的趨勢測定 第1部分:剛果紅法
英文標準名稱：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
標準類型：G31
發(fā)布日期：1999/12/31 12:00:00
實施日期：1990/12/15 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.20
適用范圍：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