ISO 16770:2004 塑料-聚乙烯环境应力裂纹测定-槽口塑性变形试验

标准编号：ISO 16770:2004

中文名称：塑料-聚乙烯环境应力裂纹测定-槽口塑性变形试验

英文名称：Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full-notch creep test (FNCT)

发布日期：2004-02

标准范围

ISO 16770:2004规定了在任何环境中测定聚乙烯材料抗应力开裂性的方法。本试验在从模压板或成品（如适用）上切下的缺口试样上进行。将试样浸入规定温度下的表面活性剂溶液等环境中，承受静态拉伸载荷，并测量失效时间。该方法是专门为聚乙烯材料开发的，但可用于评估PE挤压件，如管段、PE熔焊/管件和吹塑件-用于研究侵蚀性环境（即危险品/化学品）影响的模制聚乙烯容器。该方法也可适用于其他热塑性材料，例如聚丙烯（PP）。在这种情况下，在解释结果时必须小心，因为成品中的加工应力/方向可能会产生影响。

ISO 16770:2004 specifies a method of determining the stress cracking resistance of polyethylene materials in any environment. The test is carried out on notched test specimens cut from compression-moulded sheet or finished products, as applicable. The test specimen is subjected to a static tensile load when immersed in an environment such as a surfactant solution held at a specified temperature, and the time to failure measured.The method has been specifically developed for polyethylene materials but can be used to evaluate PE extrusions, such as pipe segments, PE fusion welds/fittings and blow-moulded PE containers to study the effect of aggressive environments, i.e. dangerous goods/chemicals. The method may also be adapted for other thermoplastic materials, e.g. polypropylene (PP). In this case, care must be taken in interpreting the results as the processing stresses/orientation in finished products may have an effect.

标准预览图