1.1 本试验方法包括使用差动粘度计或改进的差动粘度表测定聚合物溶液粘度。它适用于所有完全溶解而不发生化学反应或降解形成随时间和温度稳定的溶液的聚合物。试验结果通常表示为比粘度、特性粘度（极限粘度数）、特性粘度或相对粘度（粘度比）。 1.2 由于有多种类型的粘度计可用于测量压差，请遵循适用于所用设备的制造商指示。 1.3 溶液粘度值与使用试验方法的玻璃毛细管获得的粘度值相当 D2857型 本试验方法与玻璃毛细管的不同之处在于，在进行试验的同时比较溶剂和溶液。使用玻璃毛细管时，必须将每个溶液参照回相同温度下同一毛细管中的溶剂。 1.4 以国际单位表示的数值视为标准值。本标准不包括其他计量单位。 1.5 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。 有关具体危险说明，请参见第节 8. . 注1: 没有已知的ISO等同于本标准。 1.6 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 聚合物的溶液粘度值与溶解在溶剂中的聚合物部分的平均分子尺寸有关。

1.1 This test method covers the determination of the solution viscosity of polymers using a differential or the modified differential viscometer. It is applicable to all polymers that dissolve completely without chemical reaction or degradation to form solutions that are stable with time and temperature. Results of the test are usually expressed as specific viscosity, intrinsic viscosity (limiting viscosity number), inherent viscosity (logarithmic viscosity number), or relative viscosity (viscosity ratio). 1.2 Since there is more than one type of viscometer available to measure a differential pressure, follow the manufacturer’s directions applicable to the equipment being used. 1.3 The solution viscosity values are comparable with those obtained using a glass capillary of Test Method D2857 . This test method differs from the glass capillary in that the solvent and the solution are compared at the same time that a test is run. With a glass capillary, each solution must be referenced back to the solvent run in the same capillary at the same temperature. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. For specific hazard statements, see Section 8 . Note 1: There is no known ISO equivalent to this standard. 1.6 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 Solution viscosity values for polymers are related to the average molecular size of that portion of the polymer which dissolves in the solvent.