1.1 本试验方法包括测定术语中定义的乙烯塑料的敏感性 D883 ，在本文规定的条件下发生环境应力开裂。在某些应力条件下，在肥皂、润湿剂、油或洗涤剂等环境中，乙烯塑料可能会因开裂而出现机械故障。 1.2 以国际单位制表示的数值应视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本标准。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法可用于常规检查，方法是将所需数量的试样在规定时间内置于试验条件下，并记录不合格的数量。使用测试试剂获得的开裂表明，未被聚合物明显吸收的各种表面活性剂、肥皂和有机物质可能会产生开裂。 5.2 环境应力开裂是一种高度依赖于所施加应力的性质和水平以及试样的热历史的特性 ( 1. ) . 在试验方法的条件下，通过引入受控缺陷，产生了较高的局部多轴应力 ( 2. , 3. ) . 已发现在这种条件下最容易发生环境应力开裂。 注2: 规范中定义的不同类型的聚乙烯塑料 D1248 通常在不同的应变和应力水平下进行测试。当明确需要在同等应变水平下比较类型时，应在条件B下测试所有类型的试样， 表1 ( 4. ) . （A） 尺寸值并不完全相等。然而，出于仲裁目的，公制单位应适用。 （B） 出于仲裁目的，Igepal的浓度将符合适当的材料标准。如果没有给出浓度，则为10 % 应使用体积溶液。 （C） 在100°C的温度下，通常使用全强度试剂，而不是试剂的水溶液，因为在试验期间，溶液往往会因水分蒸发损失而改变其成分。 5.3 本试验方法中的信息不用于直接应用于工程问题。 注3: 使用本试验方法将各种乙烯塑料进行比较和排序时，应小心（见第节） 13 和注释12）。 由于热历史被认为是一个重要变量，因此使用实验室模制样品的本试验方法的试验结果不一定与通过其他方式获得的样品的试验结果一致。然而，最好使用从商业制备的物品中获得的样品来确定给定乙烯塑料的真实性能潜力 ( 5. ) .

1.1 This test method covers the determination of the susceptibility of ethylene plastics, as defined in Terminology D883 , to environmental stress-cracking when subjected to the conditions herein specified. Under certain conditions of stress and in the presence of environments such as soaps, wetting agents, oils, or detergents, ethylene plastics may exhibit mechanical failure by cracking. 1.2 The values stated in SI units are to be regarded as standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: There is no known ISO equivalent to this standard. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method may be used for routine inspection purposes by subjecting a required number of specimens to the test conditions for a specified time and noting the number that fail. The cracking obtained with the test reagent is indicative of what may be expected from a wide variety of surface-active agents, soaps, and organic substances that are not absorbed appreciably by the polymer. 5.2 Environmental stress-cracking is a property that is highly dependent upon the nature and level of the stresses applied and on the thermal history of the specimen ( 1 ) . Under the conditions of the test method, high local multiaxial stresses are developed through the introduction of a controlled imperfection ( 2 , 3 ) . Environmental stress-cracking has been found to occur most readily under such conditions. Note 2: Different types of polyethylene plastics as defined in Specification D1248 are generally tested under different levels of strain and stress. When it is expressly desired to compare the types at equal levels of strain, the specimens for all types should be tested under Condition B, Table 1 ( 4 ) . (A) Dimensional values are not exactly equivalent. However, for referee purposes the metric units shall apply. (B) For referee purposes, concentration of Igepal will be consistent with the appropriate material standard. If no concentration is given, then 10 % volume solution shall be used. (C) At a temperature of 100°C, a full-strength reagent, rather than an aqueous solution of a reagent, is generally used because solutions tend to change their compositions by water evaporation losses during the period of test. 5.3 Information from this test method is not intended to be used for direct application to engineering problems. Note 3: Caution should be used in comparing and ranking various ethylene plastics into distinct and separate groups by this test method (see Section 13 and Note 12). As thermal history is recognized as an important variable, test results by this test method employing laboratory molded samples cannot necessarily be expected to show agreement with test results from samples obtained by other means. The true performance potential of a given ethylene plastic may, however, best be determined with specimens obtained from commercially prepared items ( 5 ) .