ISO 4504

Under publication (Edition 2, 2025)

Final production steps (up to seven weeks).

Will replace ISO 4504:2023

Abstract

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.

General information

Status
: Under development

Publication date
: 2025-05

Stage
: International Standard under publication [60.00]
Edition
: 2
Technical Committee :
ISO/TC 61/SC 9

ICS :
83.080.20
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