标准摘要
[中文适用范围]： ISO 1628 的这一部分定义了测定聚乙烯和聚丙烯在 135 °C 稀溶液中的比浓粘度（也称为粘数）和特性粘度的特定条件。 聚合物溶液的粘度可能会受到样品中存在的添加剂的影响。 因此，如果样品含有填料或其他添加剂，则通过该方法测定的比浓粘度值可能不可靠。 [外文原描述]： ISO 1628-3:2010 defines particular conditions for determining the reduced viscosity (also known as viscosity number) and intrinsic viscosity of polyethylenes and polypropylenes at 135 °C in dilute solution. The viscosity of polymer solutions may be affected by additives present in the sample. The value of a reduced viscosity determined by this method may therefore be unreliable if the sample contains fillers or other additives.
英文名称Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 3: Polyethylenes and polypropylenes