BS EN ISO 3146-2000 塑料.用毛细管和偏振显微镜法测定半晶状聚合物的熔化性能(熔化温度或熔化区域)

标准号：BS EN ISO 3146-2000
中文标准名称：塑料.用毛细管和偏振显微镜法测定半晶状聚合物的熔化性能(熔化温度或熔化区域)
英文标准名称：Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
标准类型：G31
发布日期：2000/9/15 12:00:00
实施日期：2000/9/15 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.10
适用范围：This International Standard specifies two methods for evaluating the melting behaviour of semi-crystalline polymers. Melting temperatures determined by the different methods usually differ by several kelvins for the reasons explained in the introduction. 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 may also be useful for the evaluation of the softening of non-crystalline solids. 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 may not be suitable for plastics compounds containing pigments and/or other addi-tives which could interfere with the birefringence of the polymeric crystalline zone. NOTE 2 Another method applicable to semi-crystalline polymers is described in ISO 11357-3:1999, Plastics —Differential scan-ning calorimetry (DSC) —Part 3: Determination of temperature and enthalpy of melting and crystallization.