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Cited by 308

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Tunable Thermosetting Epoxies Based on Fractionated and Well-Characterized Lignins

Open access
Gioia, Claudio, Lo Re, Giada, Lawoko, Martin, Berglund, Lars·2018·Journal of the American Chemical Society
DOI 10.1021/jacs.7b13620
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Abstract

Abstract Here we report the synthesis of thermosetting resins from low molar mass Kraft lignin fractions of high functionality, refined by solvent extraction. Such fractions were fully characterized by 31P NMR, 2D-HSQC NMR, SEC, and DSC in order to obtain a detailed description of the structures. Reactive oxirane moieties were introduced on the lignin backbone under mild reaction conditions and quantified by simple 1H NMR analysis. The modified fractions were chemically cross-linked with a flexible polyether diamine (Mn ≈ 2000), in order to obtain epoxy thermosets. Epoxies from different lignin fractions, studied by DSC, DMA, tensile tests, and SEM, demonstrated substantial differences in terms of thermo-mechanical properties. For the first time, strong relationships between lignin structures and epoxy properties could be demonstrated. The suggested approach provides unprecedented possibilities to tune network structure and properties of thermosets based on real lignin fractions, rather than model compounds.

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Metadata

Authors
Gioia, C., Lo Re, G., Lawoko, M., & Berglund, L.
Venue
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Published
2018-03-02
Volume
140
Issue
11
Pages
4054-4061
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
DOI
10.1021/jacs.7b13620
OpenAlex
W2792394734
Cited by
308
References
36
FWCI
11.23
Type
journal article
Language
en
Open access
hybrid

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