Structure-property relationships of cis-resveratrol cyanate ester blends

cis-ResCy is a relatively low melting cyanate ester monomer (<80 °C) derived from the renewable phenol, resveratrol. Thermal cross-linking of this material generates high Tg polycyanurate network with char yield >73% in air (600 °C). However, still presents processing challenges because it solid at room temperature and readily recrystallizes upon cooling below point. In study, was blended commercial resins (Primaset LeCy, PT15, PT30) loadings between 0 80% (by mass) to improve processability evaluate structure-property relationships blends corresponding networks. Blends LeCy were solids, while PT15 PT30 remained liquid after mixing. The cure chemistry evaluated thermomechanical properties, thermal stability, moisture uptake, hot/wet properties networks studied. general, yields increased higher loading. This result most pronounced for networks, which yielded much (>70% air) ≥ 40% loading compared pure (<40% air). Tgs increasing content reached temperatures as 391 °C in-situ cure. Overall, combination various esters allowed development processable Tgs, improved lower uptake than components.