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ISO 10993-7:2026 Biological evaluation of medical devices — Part 7: Ethylene oxide sterilization residuals

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ISO 4504:2025

ISO 4504:2025 Plastics — Polyethylene (PE) — Determination of co-monomer content by solution state 13C-NMR spectrometry

CDN $296.00

This publication was last reviewed and confirmed in 2025.

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

Description

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.

Edition

2

Published Date

2026-06-19

Status

PUBLISHED

Pages

28

Language Detail Icon

English

Format Secure Icon

Secure PDF

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.

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