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Issue 7, 2014
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Synthesis and characterization of an extractive-based bio-epoxy resin from beetle infested Pinus contorta bark

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Abstract

This work outlines the synthesis and characterization of a green epoxy resin derived from bark extractives. The resins were prepared at various temperatures and catalyst amounts to determine the optima for the yield and epoxy equivalent weight values. FTIR and NMR techniques were used to characterize the chemical structures of extractive-based epoxy (E-epoxy) monomers. Measurement results indicated successful epoxidation of bark extractives after reaction with epichlorohydrin. GPC results revealed that the molecular weights and polydispersities of E-epoxy monomers were lower than those of lignin epoxy (L-epoxy) monomers. The curing kinetic parameters calculated by the Kissinger method and the Model-Free method showed that E-epoxy had a lower curing activation energy value than petroleum-based epoxy (P-epoxy). E-epoxy displayed tensile strength and thermal stability comparable to P-epoxy. The research outcome demonstrated there is promise of using bark extractives to synthesize epoxy resins replacing toxic bisphenol A.

Graphical abstract: Synthesis and characterization of an extractive-based bio-epoxy resin from beetle infested Pinus contorta bark

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Supplementary files

Article information


Submitted
16 Mar 2014
Accepted
17 Apr 2014
First published
17 Apr 2014

Green Chem., 2014,16, 3483-3493
Article type
Paper
Author version available

Synthesis and characterization of an extractive-based bio-epoxy resin from beetle infested Pinus contorta bark

P. Kuo, M. Sain and N. Yan, Green Chem., 2014, 16, 3483
DOI: 10.1039/C4GC00459K

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