本文件规定了两种评估半结晶聚合物熔融行为的方法。 a） 方法a:毛细管 这种方法基于聚合物形状的变化。它适用于所有半结晶聚合物及其化合物。 注？1？方法A也可用于评估非结晶固体的软化。 b） 方法b:偏光显微镜 该方法基于聚合物光学性质的变化。它适用于含有双折射晶相的聚合物。它可能不适用于含有颜料和/或其他添加剂的塑料化合物，这些颜料和/或添加剂可能会干扰聚合物结晶区的双折射。 注2:ISO 11357-3中描述了另一种适用于半结晶聚合物的方法。

This document specifies two methods for evaluating the melting behaviour of semi-crystalline polymers. a) Method A: Capillary tube This method is based on the changes in shape of the polymer. It is applicable to all semi-crystalline polymers and their compounds. NOTE？1？Method A can also be useful for the evaluation of the softening of non-crystalline solids. b) Method？B: Polarizing microscope This method is based on changes in the optical properties of the polymer. It is applicable to polymers containing a birefringent crystalline phase. It might not be suitable for plastics compounds containing pigments and/or other additives which can interfere with the birefringence of the polymeric crystalline zone. NOTE？2？Another method applicable to semi-crystalline polymers is described in ISO？11357？3.