期刊
GREEN CHEMISTRY
卷 14, 期 8, 页码 2346-2352出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2gc35672d
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资金
- U.S. Army Research Laboratory [WP-1758, W911NF-06-2-001]
Lignin is an abundant, renewable material that has the potential to yield valuable, low molecular weight, single aromatic chemicals when strategically depolymerized. In order to generate a highly bio-based thermoset for use in polymer composites, a lignin-derived chemical, vanillin, was methacrylated in a two-step, one-pot synthesis to produce a vinyl ester resin (87 cP at 25 degrees C) with a 1 : 1 mole ratio of a mono-functional monomer, methacrylated vanillin, to cross-linking agent, glycerol dimethacrylate. The synthetic scheme was solventless, required little catalyst and moderate reaction temperatures while generating no by-products. Upon resin curing, a hard, transparent thermoset with a broad glass transition, T-g = 155 degrees C (based on the tan delta maximum), and a temperature of maximum decomposition rate, T-max, of 426 degrees C was produced. Overall, a potentially 100% bio-based thermoset was synthesized possessing comparable thermo-gravimetric and thermo-mechanical properties to commercial vinyl ester-based thermosets.
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