ISO 4504:2025

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

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ISO 4504:2025

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

PUBLISH DATE 2025
ISO 4504:2025

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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