ISO 182-4:1993 塑料.基于氯乙烯均聚物和共聚物的化合物及产物在高温下析出氯化氢和其它酸性产物的趋势测定.第4部分：电位测量法

标准编号：ISO 182-4:1993

中文名称：塑料.基于氯乙烯均聚物和共聚物的化合物及产物在高温下析出氯化氢和其它酸性产物的趋势测定.第4部分：电位测量法

英文名称：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 temperature

发布日期：1993-04

标准范围

该方法的原理是在氮气流中将PVC的试验部分保持在商定的温度，吸收在给定量的适当溶液中析出的氯化氢，并根据吸收溶液中pCl的记录变化电位测定析出的氯化氢量。该方法仅适用于复合PVC材料和产品，但在适当条件下可用于粉末状聚合物。

The principle of the method is maintaining a test portion of the PVC at an agreed temperature in a nitrogen gas stream, absorbing the hydrogen chloride evolved in a given amount of an appropriate solution, and potentiometrically determining the amount of hydrogen chloride evolved in relation to the recorded change in pCl of the absorbing solution. The method is recommended for compounded PVC materials and products only, although it can be used for polymers in powder form under appropriate conditions.

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