Plastics - Determination of viscosity using a falling-ball viscometer - Part 1: 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 0,6 mPaĀ·s to 250 000 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 | ISO: International Organization for Standardization |
| Document Number | ISO 12058 |
| Publication Date | Not Available |
| Language | en - English |
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| Supercedes | |
| Committee | ISO/TC 61/SC 5 |
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