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B51-14 (R2019) – Boiler, pressure vessel, and pressure piping code

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ISO 4504:2023

ISO 4504:2023 Plastics – Polyethylene (PE) – Determination of co-monomer content by solution state 13C-NMR spectrometry

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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

1

Published Date

2023-06-16

Status

PUBLISHED

Pages

25

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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