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.
Số hiệu tiêu chuẩn
ISO 182-2
Tên tiêu chuẩn
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
Ngày phát hành
1990-12-00
Tiêu chuẩn tương đương
NF T51-785-2*NF ISO 182-2 (1993-09-01), IDT *
NF T51-785-2*NF EN ISO 182-2 (1999-09-01), IDT * DIN 53381-1 (1983-05), IDT * DIN EN ISO 182-2 (2000-02), IDT * DIN EN ISO 182-2 (1999-02), IDT * BS EN ISO 182-2 (1991-04-30), IDT * BS 2782-1 Method 130B (1976-09-30), NEQ * EN ISO 182-2 (1999-06), IDT * prEN ISO 182-2 (1998-09), IDT * SN EN ISO 182-2 (1999-12), IDT * OENORM EN ISO 182-2 (1999-12-01), IDT * OENORM EN ISO 182-2 (1999-01-01), IDT * PN-EN ISO 182-2 (2002-08-12), IDT * SS-EN ISO 182-2 (1999-06-18), IDT * UNE-EN ISO 182-2 (2000-06-28), IDT * STN EN ISO 182-2 (2001-10-01), IDT * CSN EN ISO 182-2 (2000-03-01), IDT * DS/EN ISO 182-2 (1999-11-08), IDT * NEN-EN-ISO 182-2:1999 en (1999-06-01), IDT * NEN-ISO 182-2:1992 en (1992-05-01), IDT
Từ khóa
Copolymers * Decomposition * Definitions * Deterioration * Determination * High-temperature testing * Homopolymers * Hydrogen chloride * Inspection * Inspection by attributes * Mouldings (shaped section) * pH measurement * pH meters * Plastics * Polyvinyl chloride * Quality control * Stability * Testing * Thermal properties of materials * Thermal stability * Thermal testing * Vinyl chloride * Moulding materials * Dehydrochlorination * PVC * Polymerisates * Congo red method
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