DIN EN ISO 1628-5:2026-07
Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 5: Thermoplastic polyester (TP) homopolymers and copolymers (ISO/DIS 1628-5:2026); German and English version prEN ISO 1628-5:2026 / Note: Date of issue 2026-06-05*Intended as replacement for DIN EN ISO 1628-5 (2015-05).
| Fecha edición: |
2026-07-01
En Vigor
|
|---|---|
| Idiomas disponibles: | Alemán, Inglés |
| Resumen: | This part of ISO 1628 specifies a method for the determination of the viscosity number (also referred to as "reduced viscosity") 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, referred to in ISO 20028-1:2019, 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 1628-1:2024, 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. |
| Keywords: | Copolymers|Determination|Differential pressure measurement|Differential pressures|Homopolymers|Limits (mathematics)|Measurement|Measuring techniques|Mouldings (shaped section)|Phthalates|Plastics|Polyethylene terephthalate|Polymers|Solutions|Solvents|Testing|Viscometers|Viscosity|Viscosity measurement|Viscosity numbers |
| ICS: | 83.080.20 - Materiales termoplásticos |
| CTN: |
Normas citadas
Libros relacionados
Normas relacionadas
Colecciones temáticas relacionadas
