Plastics. Polyethylene (PE). Determination of co-monomer content by solution state <sup>13</sup>C-NMR spectrometry

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

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1   Scope

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):
  1. — Method A: inverse gated decoupling method;
  2. — 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.