Polymer(Korea), Vol.45, No.4, 581-591, July, 2021
Stilbene 구조를 지닌 바이오 기반 에폭시 열경화성 수지의 높은 Tg 및 난연성
Bio-based Epoxy Thermoset Containing Stilbene Structure with Ultrahigh Tg and Excellent Flame Retardancy
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Bio-based epoxy resins with an ultrahigh glass transition temperature (Tg) and excellent flame retardancy are critical for developing sustainable polymers. Herein, a novel trifunctional epoxy monomer triglycidyl ether of resveratrol (TGER) was synthesized from renewable resveratrol. The chemical structure of TGER was confirmed by Fourier transform infrared (FTIR), 1H, and 13C nuclear magnetic resonance (NMR) spectroscopy which was then reacted with 4,4'-diaminodiphenylmethane (DDM) to form resin. The obtained resin was evaluated in terms of flame retardance and thermal properties. The resultant TGER-DDM 240 resin shows excellent flame-retardant properties, presenting a residual char of 42.5% at 800 °C, limiting oxygen index (LOI) of 31.2%, and flammability rating of V-0 in UL94 test. Moreover, the resin possesses an ultrahigh Tg at 294 °C. This work provides a facile method for preparing high-performance flame-retardant epoxy resin from a renewable resource.
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