Work

Diffusion (DOSY) 1H NMR as an Alternative Method for Molecular Weight Determination of Poly(ethylene furanoate) (PEF) Polyesters

Year: 2016

Type: article

Abstract: Poly(ethylene furanoate) (PEF) is a promising 100% biomass‐derived alternative to poly(ethylene terephthalate) (PET), but challenges all solution characterization methods due to its insolubility in most common solvents. Diffusion (DOSY) 1 H NMR can be an alternative, reliable and fast method to analyze molecular weights of PEF polyesters. Calibration with PET standards yields excellent agreement of DOSY predictions with the absolute M n and M w values obtained via size exclusion chromatography equipped with multi‐angle light scattering detector in the range of commercial relevance ( M w < 100 000 g mol −1 ). Mean square displacement analysis shows unhindered molecular diffusion for all tested concentrations (from 0.4 to 30 mg mL −1 ). The DOSY procedure can be optimized toward shorter analysis times (down to 1 min) and a more straightforward implementation, making it a powerful and fast tool for molecular weight analysis in the laboratory as well as in industrial process applications. image

Source: Macromolecular Chemistry and Physics

DOI: 10.1002/macp.201600436

Authors: Jan‐Georg Rosenboom, Jonathan De Roo, Giuseppe Storti, Massimo Morbidelli

Institutions: ETH Zurich, Institute for Chemical and Bioengineering, Ghent University

Language: English

Topic: biodegradable polymer synthesis and properties

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: Kommission für Technologie und Innovation, Eidgenössische Technische Hochschule Zürich, Fonds Wetenschappelijk Onderzoek, Vlaamse regering

Awards: G4749443922, G8890205259