ISO 182-3:2023 塑料 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它酸性产物趋势的测定 第3部分：电导分析法
标准编号：ISO 182-3:2023
中文名称：塑料 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它酸性产物趋势的测定 第3部分：电导分析法
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：2023-12
标准范围
本文件规定了一种测定基于经历脱氯化氢(氯化氢的析出)的氯乙烯均聚物和共聚物(在下文中缩写为PVC)的化合物和产物在高温下的热稳定性的方法。本文件适用于PVC化合物和产品的表征，特别是关于其热稳定体系的有效性。它适用于在热作用下变色测试可能不令人满意的有色PVC化合物和产品。本文件适用于复合PVC材料和制品。它可以在适当条件下适用于粉末形式的聚合物，这将在相关方之间达成一致。该文献不适用于干混物形式的PVC化合物，因为此类材料可能不够均匀。本文件不适用于在高温下除氯化氢外还会产生其他分解产物的PVC化合物和产品，当它们被水吸收时，这些分解产物会影响水的导电性。在这种情况下，应使用适用于测定吸收液中氯离子（Cl？）的方法（见ISO？182-4[2]）。本文件还可应用于在相关规范规定的条件下或在相关方之间商定的条件下加热时可释放氯化氢或其他卤化氢的其他塑料材料。
This document specifies a method for the determination of the thermal stability at elevated temperature of compounds and products based on vinyl chloride homopolymers and copolymers (in the following text abbreviated as PVC) which undergo dehydrochlorination (the evolution of hydrogen chloride).
This document is applicable to the characterization of PVC compounds and products, especially with regard to the effectiveness of their heat-stabilizing systems.
It is applicable to coloured PVC compounds and products where a discolouration test under the action of heat may be unsatisfactory.
This document is applicable to compounded PVC materials and products. It can be applicable to polymers in powder form under appropriate conditions, to be agreed upon between the interested parties.
This document does not apply to PVC compounds in the form of dry blends, since such materials can be not sufficiently homogeneous.
This document does not apply to PVC compounds and products which evolve other decomposition products, in addition to hydrogen chloride, at elevated temperatures that can affect the conductivity of water when they are absorbed into it. In this case, a method suitable for the determination of chloride ion (Cl？) in the absorbing solution shall be used (see ISO 182-4[2]).
This document can also be applied to other plastics materials which can evolve hydrogen chloride or other hydrogen halides when heated under the conditions prescribed by the relevant specifications, or as agreed upon between the interested parties.
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