1.1 本试验方法测量聚醚多元醇中的不饱和度。（参见 注1 .) 它使用2毫升约0.05 M 醋酸汞试剂在甲醇和大约1g或更少的样品中。本试验方法使用电位法测定终点。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 许多监管机构已将汞指定为一种危险物质，可导致严重的医疗问题。汞或其蒸汽已被证明对健康有害，并对材料具有腐蚀性。处理汞和含汞产品时应小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。用户应意识到，法律可能禁止向您所在的州或国家销售汞和/或含汞产品。 1.4 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: 本标准等同于ISO 17710 1.5 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 该测试方法适用于质量控制、规范测试和研究。 5.2 在聚丙烯氧化物中形成不饱和化合物的副反应产生少量聚合物，每条链只有一个羟基。 这些不饱和聚合物降低了功能性和分子量，同时拓宽了整体分子量分布。

1.1 This test method measures unsaturation in polyether polyols. (See Note 1 .) It uses 2 mL of ca. 0.05 M mercuric acetate reagent in methanol and about 1 g of sample or less. This test method uses a potentiometric determination of an end point. 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 Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury containing products. See the applicable product Safety Data Sheet (SDS) for additional information. Users should be aware that selling mercury and/or mercury containing products into your state or country may be prohibited by law. 1.4 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: This standard is equivalent to ISO 17710. 1.5 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 is suitable for quality control, as specification tests, and for research. 5.2 Side reactions that form unsaturated compounds in polypropylene oxides produce small amounts of polymers with only one hydroxyl group per chain. These unsaturated polymers lower functionality and molecular weight, while broadening the overall molecular-weight distribution.