▎ 摘　　要

Flame retardant, tough and heat-resistant thermosetting composites have been developed through building crosslinked network based on cyanate ester (CE) and unique hybridized graphene oxide (FGO) with phosphorus and silicone. The integrated performances of FGO/CE composites were studied and compared with those of graphene oxide (GO)/CE composites and CE resin. Attractively, with the same loading of fillers, FGO/CE composite has much better integrated performances than GO/CE composite, including not only flame retardancy, but also thermal stability, toughness and rigidity. Especially, the phosphorus content of FGO/CE composite is as low as 0.18 wt%, much lower than the necessary phosphorus concentration (1.1-7.8 wt%) for available phosphorus flame retardants. The origins behind attractive properties were intensively studied and found to be attributed to unique crosslinked structure induced by the presence of FGO. 2017 Elsevier Ltd. All rights reserved.