ISO 4504

En cours de publication (Edition 2, 2025)

Étapes finales du processus d’élaboration (jusqu’à sept semaines).

Remplacera ISO 4504:2023

Résumé

This document specifies two methods for the determination of co-monomer contents of polyethylene products by solution state ¹³C-NMR spectrometry (nuclear magnetic resonance spectrometry):

— method A: inverse gated decoupling method.

— method B: insensitive nuclei enhanced by polarization transfer method;

This document is applicable to copolymers of ethylene having a content of other 1-olefinic monomers of less than a mass fraction of 50 %.

This document is not applicable to ethylene homopolymers or copolymers in which ethylene is polymerized with two or more type 1-olefin comonomers.

Informations générales

État actuel
: Projet

Date de publication
: 2025-05

Stade
: Norme internationale en cours de publication [60.00]
Edition
: 2
Comité technique :
ISO/TC 61/SC 9

ICS :
83.080.20
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