UNE EN ISO 1628-5:2015
Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 5: Thermoplastic polyester (TP) homopolymers and copolymers (ISO 1628-5:1998)
Plásticos. Determinación de la viscosidad de polímeros en solución diluida mediante viscosímetros capilares. Parte 5: Homopolímeros y copolímeros de poliésteres termoplásticos (TP).
| Označení normy: | UNE EN ISO 1628-5:2015 |
| Počet stran: | 18 |
| Vydáno: | 2015-05-13 |
| Status: | Norma |
| Počet stran (Španělsky): | 16 |
UNE EN ISO 1628-5:2015
This part of ISO 1628 specifies a method for the determination of the viscosity number (also referred toas 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 asto copolyesters and other polyesters, defined in ISO 7792-1, that are soluble in one of the specifiedsolvents under the specified conditions. The viscosity number is determined by the general procedure specified in ISO 1628-1, observing theparticular conditions specified in this part of ISO 1628. The determination of the viscosity number of a thermoplastic polyester provides a measure of therelative molecular mass of the polymer.