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ISO 4504:2025

Plastics — Polyethylene (PE) — Determination of co-monomer content by solution state 13C-NMR spectrometry

Publication date:   May 13, 2025

General information

60.60   Standard published   May 13, 2025

ISO

ISO/TC 61/SC 9 Thermoplastic materials

International Standard

83.080.20   Thermoplastic materials

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4504:2023

NOW

PUBLISHED
ISO 4504:2025
60.60 Standard published
May 13, 2025