ISO 12058-1:2018 塑料 用降球粘度计测定粘度 第1部分：斜管法

标准编号：ISO 12058-1:2018

中文名称：塑料 用降球粘度计测定粘度 第1部分：斜管法

英文名称：Plastics — Determination of viscosity using a falling-ball viscometer — Part 1: Inclined-tube method

发布日期：2018-07

标准范围

本文件规定了使用斜管落球粘度计测定液体乳化或分散状态下聚合物和树脂粘度的方法的一般原理。适用于粘度测量范围为0.6 mPa·s至250 000 mPa·s（温度范围为-20°C至+120°C）的液体，剪切应力和剪切速率成正比，即粘度与剪切速率无关。这种理想行为通常被称为牛顿行为。如果液体与此特性有显著差异，则使用落球式粘度计的不同球或具有不同几何形状的粘度计（如毛细管粘度计和旋转粘度计）可以获得不同的结果。

This document specifies the general principles of a method, using an inclined？tube falling？ball viscometer, for determining the viscosity of polymers and resins in the liquid emulsified or dispersed state. It is intended for application to liquids over a viscosity measurement range of 0,6 mPa·s to 250 000 mPa·s (temperature range？20 °C to +120 °C) for which the shear stress and shear rate are proportional, i.e. the viscosity is independent of the shear rate. This ideal behaviour is commonly known as Newtonian behaviour. If a liquid differs significantly from this behaviour, different results can be obtained with the different balls of a falling？ball viscometer or from viscometers with different geometries, such as capillary and rotational viscometers.

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