Plastics. Determination of viscosity using a falling-ball viscometer -- Inclined-tube method
This document specifies the general principles of a method, using an inclinedātube fallingāball 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 0,6Ā mPaĀ·s to 250Ā 000Ā mPaĀ·s (temperature range ā20 °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 fallingāball viscometer or from viscometers with different geometries, such as capillary and rotational viscometers.
| SDO | BSI: British Standards Institution |
| Document Number | ISO 12058-1 |
| Publication Date | Aug. 31, 2018 |
| Language | en - English |
| Page Count | 14 |
| Revision Level | |
| Supercedes | |
| Committee | PRI/21 |