本文件规定了在标准测试条件下通过煮沸正庚烷来测定可从结晶丙烯塑料中提取的物质百分比的方法。全同立构指数通过常规化学萃取作为绝对方法测定。 该方法根据ISO 19069-1[1]提供了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。 该方法从特定细度的颗粒形式的固体丙烯塑料开始。

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.