標準號：ISO 182-2-1990
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物在高溫下析出氯化氫和其他酸性產物的趨勢測定 第2部分:pH值法
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 2: pH method
標準類型：G31
發布日期：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：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.