Facile Catalyst‐Free Approach toward Fully Biobased Reprocessable Lignin Thermosets

Reprocessable and biobased thermosets are prepared from two renewable feedstocks, lignin and polyamine (Priamine 1071). Lignin is oxidized to produce polycarbonyl and further reacts with polyamine to form a crosslinked network of imines. The thermoset materials are formed under heat and pressure in...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 2023-02, Vol.224 (3), p.n/a
Main Authors: Buzoglu Kurnaz, Leman, Bension, Yishayah, Tang, Chuanbing
Format: Article
Language:English
Subjects:
Catalysts
Crosslinking
Imines
Lignin
Polyamines
polyimine
Raw materials
Thermodynamic properties
thermosets
Thermosetting resins
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Summary:Reprocessable and biobased thermosets are prepared from two renewable feedstocks, lignin and polyamine (Priamine 1071). Lignin is oxidized to produce polycarbonyl and further reacts with polyamine to form a crosslinked network of imines. The thermoset materials are formed under heat and pressure in the absence of any catalysts. The mechanical strength and thermal properties of thermosets are tunable by changing feedstock ratios. The dynamic imine crosslinks can be associatively reformed. Fully biobased thermosets are prepared from lignin and Priamine 1071. A polyimine network is established, and tunable mechanical properties are achieved by tuning the lignin content. The lignin‐based thermosets are reprocessable in the absence of any catalysts.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.202200303