Microstructural Analysis of Poly(ethylene-co-propylene-co-1-butene) terpolymers by Multidimensional NMR Spectroscopy

Anuttra Nuamthanom; Phusadee Sandee

doi:10.60136/bas.v1.2012.168

Authors

Anuttra Nuamthanom Department of Science Service
Phusadee Sandee ThaiPolyethylene Co., Ltd.

DOI:

https://doi.org/10.60136/bas.v1.2012.168

Keywords:

Multidimensional NMR spectroscopy, Poly(ethylene-co-propylene-co-1-butene)

Abstract

Physical, rheological and optical properties of polymer depend on its molecular microstructure. Specifically, the monomer content and sequence distribution of polymer significantly affect the mechanical performance of the final product. To this base, Nuclear Magnetic Resonance Spectroscopy (NMR) has been introduced as a very powerful technique to study the microstructure of polymer. The purpose of this study was to develop a methodology to investigate the microstructure of poly(ethylene-co-propylene-co-butene) terpolymer by using multidimensional NMR spectroscopy, including pulsed-field-gradient (PFG) ¹H-¹³C heteronuclear single quantum coherence (GHSQC), heteronuclear multiple bond coherence (gHMBC), and heteronuclear single quantum coherence-total correlation spectroscopy (GHSQC-TOCSY). The combination of 1D and 2D NMR experiments, permit the characterization of the complex structure of poly(ethylene-co-propylene-co-butene) terpolymer. The completed ¹³C NMR assignments provided in this work allow more accurate quantitative determination of the microstructure in these polymers.

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