1.1 本规程涵盖了橡胶在低温下的特征机械性能，并概述了在这些温度下进行测试所需的调节程序。 1.2 建立令人满意的低温试验技术的第一阶段之一是规定试样的暴露时间和温度。已经证明，以下任何一个或多个明显的变化，详见 表1 ，可能发生在降低测试温度时: 1.2.1 简单的温度效应， 1.2.2 玻璃过渡，以及 1.2.3 一级转变（结晶）以及与增塑剂相关的溶解度和其他影响。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。 本标准的使用者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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 3.1 只有当样品的预处理一致时，橡胶的低温试验才能产生可重复的结果。脆性和模量等特性在很大程度上受到暴露时间/温度变化的影响。 本规程旨在为在橡胶上进行的各种低温试验提供均匀的调节。

1.1 This practice covers the characteristic mechanical behavior of rubbers at low temperatures, and outlines the conditioning procedure necessary for testing at these temperatures. 1.2 One of the first stages in establishing a satisfactory technique for low temperature testing is the specification of the time and temperature of exposure of the test specimen. It has been demonstrated that any one or more of the following distinct changes, which are detailed in Table 1 , may take place on lowering the test temperature: 1.2.1 Simple temperature effects, 1.2.2 Glass transitions, and 1.2.3 First order transitions (crystallization), and solubility and other effects associated with plasticizers. 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. 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 ====== 3.1 Low temperature testing of rubber can yield repeatable results only if the preconditioning of the samples is consistent. Properties such as brittleness and modulus are greatly affected by variations in time/temperature exposures. This practice is intended to provide uniform conditioning for the various low temperature tests conducted on rubbers.