1.1 这些试验方法包括通过毛细管熔点管或差示扫描量热法（DSC）测定商用橡胶加工化学品的熔融范围。 1.2 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 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====== 4.1 此测试方法可用于研究和开发。它也可以用于质量保证，前提是生产商和用户之间已经商定了一个标准。 4.2 为了便于识别，应通过测量更具体的物理和化学性质来补充熔融范围。 4.3 对于在熔化范围内分解的橡胶化学品，不建议使用此测试方法。 4.4 不建议将试验方法A——毛细管熔融范围确定的熔融范围作为橡胶化学品纯度的标准。

1.1 These test methods cover the determination of the melting range of commercial rubber processing chemicals either by use of capillary melting point tubes or by differential scanning calorimetry (DSC). 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. 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 ====== 4.1 This test method may be used for research and development. It also may be used for quality assurance, provided a standard has been agreed upon between a producer and a user. 4.2 For identification purposes, melting range should be supplemented by measurements of a more specific physical and chemical property. 4.3 This test method is not recommended for rubber chemicals that decompose at their melting ranges. 4.4 The melting range as determined by Test Method A—Capillary Tube Melting Range is not recommended as a criterion of purity of a rubber chemical.