标准摘要
[中文适用范围]： 该方法的原理是将 PVC 的测试部分在氮气流中保持在约定的温度，吸收在给定量的适当溶液中放出的氯化氢，并通过电位测定相对于溶液中放出的氯化氢的量。 记录吸收溶液中 pCl 的变化。 该方法仅推荐用于复合 PVC 材料和产品，但在适当条件下也可用于粉末状聚合物。 [外文原描述]： 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.
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 temperatures — Part 4: Potentiometric method