BS ISO 4504:2023 PDF

1   Scope This document specifies two methods for the determination of co-monomer contents of polyethylene products by solution state 13 C- 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.