ASTM D5225-2014
使用差分粘度计测量共聚物溶剂粘度的标准试验方法

Standard Test Method for Measuring Solution Viscosity of Polymers with a Differential Viscometer

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标准号

ASTM D5225-2014

发布日期

2014年

实施日期

废止日期

无

国际标准分类号

83.080.01 (Plastics in general)

发布单位

US-ASTM

适用范围

5.1x00a0;Solution viscosity values for polymers are related to the average molecular size of that portion of the polymer which dissolves in the solvent.

1.1x00a0;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).

1.2x00a0;Since there is more than one type of viscometer available to measure a differential pressure, follow the manufacturerx2019;s directions applicable to the equipment being used.

1.3x00a0;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.

1.4x00a0;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5x00a0; 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.

Note 1x2014;There is no known ISO equivalent to this standard.

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