ISO 18488:2015规定了一种测定应变硬化模量的方法，该模量用于测量聚乙烯的抗慢速裂纹扩展能力。 应变硬化模量由模压试样的应力-应变曲线获得。本国际标准描述了如何进行此类测量，以及如何根据此类曲线确定应变硬化模量。给出了生成有意义数据所需的设备、精度和样品制备的详细信息。 ISO 18488:2015提供了一种适用于所有类型聚乙烯的方法，该方法独立于用于管道和管件应用的制造技术、共聚单体、催化剂类型。 注:该方法可用于其他应用的材料。

ISO 18488:2015 specifies a method for the determination of the strain hardening modulus which is used as a measure for the resistance to slow crack growth of polyethylene. The strain hardening modulus is obtained from stress-strain curves on compression moulded samples. This International Standard describes how such measurement is performed and how the strain hardening modulus shall be determined from such a curve. Details of the required equipment, precision, and sample preparation for the generation of meaningful data are given. ISO 18488:2015 provides a method that is valid for all types of polyethylene, independent from the manufacturing technology, comonomer, catalyst type, that are used for pipes and fittings applications. NOTE This method could be developed for materials for other applications.