标准摘要
[中文适用范围]： 本文件规定了一种测定在标准测试条件下煮沸正庚烷可从结晶丙烯塑料中提取的物质百分比的方法。 全同立构指数是通过常规化学萃取作为绝对方法测定的。 该方法规定了 H、B 和 R 型丙烯塑料的识别和编码。 该方法仅适用于基础聚合物，不适用于混合物。 该方法从指定细度颗粒形式的固体丙烯塑料开始。 [外文原描述]： This document specifies a method for determining the percentage of matter which can be extracted from crystalline propylene plastics by boiling n-heptane under standard conditions of testing. Isotactic index is determined by conventional chemical extraction as an absolute method. This method provides for the identification and coding of types H, B and R propylene plastics according to ISO 19069-1 [1] . This method is suitable only for base polymers and is not applicable for mixtures. This method starts with solid propylene plastics in the form of particles of specified fineness.
英文名称Plastics — Polypropylene (PP) and propylene-copolymer thermoplastics — Determination of isotactic index