ISO/DIS 4504

This Draft International Standard is in the enquiry phase with ISO members.

Will replace ISO 4504:2023

ISO/DIS 4504

CHF 63

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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

Stage
: Full report circulated: DIS approved for registration as FDIS [40.99]
Edition
: 2

Number of pages
: 26
Technical Committee :
ISO/TC 61/SC 9

ICS :
83.080.20
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