BS EN ISO 1628-5:2015
Plastics. Determination of the viscosity of polymers in dilute solution using capillary viscometers Thermoplastic polyester (TP) homopolymers and copolymers
| Označení normy: | BS EN ISO 1628-5:2015 |
| Počet stran: | 14 |
| Vydáno: | 2015-03-31 |
| ISBN: | 978 0 580 87203 7 |
| Status: | Standard |
BS EN ISO 1628-5:2015
This standard BS EN ISO 1628-5:2015 Plastics. Determination of the viscosity of polymers in dilute solution using capillary viscometers is classified in these ICS categories:
- 83.080.20 Thermoplastic materials
This part of ISO 1628 specifies a method for the determination of the viscosity number (also referred to as “reduced viscosityâ€) of dilute solutions of thermoplastic polyesters (TPs) in certain specified solvents. The method is applicable to poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly-(cyclohexylenedimethylene terephthalate) (PCT), and poly(ethylene naphthalate) (PEN), as well as to copolyesters and other polyesters, defined in ISO 7792‑1 , that are soluble in one of the specified solvents under the specified conditions.
The viscosity number is determined by the general procedure specified in ISO 1628‑1 , observing the particular conditions specified in this part of ISO 1628 .
The determination of the viscosity number of a thermoplastic polyester provides a measure of the relative molecular mass of the polymer.