塑料.海上曝光法

[中文适用范围]： 本文件描述了塑料暴露在海洋环境中的三种方法。 方法 A 涵盖样本漂浮在表面上的暴露，方法 B 涵盖样本部分浸没的暴露，方法 C 涵盖样本完全浸没的暴露。 虽然该方法适用于海洋（盐水）暴露，但也可用于室外咸水和淡水暴露。 方法A中描述的塑料在陆地上的直接风化特别适用于增强降解性塑料，其中在海洋漂浮暴露下的环境降解预计相对于常规塑料材料会加速。 本文件规定了设备的一般要求以及使用所描述的测试方法的程序。 它列出了可用于评估塑料在海洋暴露下的变化的属性。 ISO 4582 中给出了有关确定塑料暴露后性能变化和报告这些结果的方法的更多具体信息。 [外文原描述]： This document describes three methods for the exposure of plastics in a marine environment. Method A covers exposures where specimens float on the surface, method B covers exposures where specimens are partially immersed method C covers exposures where specimens are completely immersed. Although intended for marine (salt water) exposure, the methodology can be used with outdoor brackish water and fresh-water exposures as well. Direct weathering of plastics on land is described in ISO 877-1, ISO 877-2 and ISO 877-3. Method A is particularly applicable to enhanced-degradability plastics where the environmental degradation under marine floating exposure is expected to be accelerated relative to that of regular plastic materials. This document specifies the general requirements for the apparatus, and procedures for using the test methods described. It lists properties that can be used to evaluate changes in plastics subjected to marine exposure. More specific information about methods for determining the changes in properties of plastics on exposure and reporting these results is given in ISO 4582.