Molecular design of cyanate ester resin using amino-POSS and C60 to create high-performance thermostable polycyanurate nanocomposites

IntroductionPolycyanurate networks (PCNs), produced through high-temperature polycyclotrimerization of cyanate ester resins (CERs), are thermally stable, densely crosslinked polymers with a unique combination of properties: high thermal stability (>400 C), high glass transition temperature (>220 C), excellent fire, radiation, and chemical resistance, strong adhesion to metals, glass, and carbon fibers, low water absorption (<2%), and low dielectric losses ( 2.6-3.1)[1][2][3][4][5][6].Due to this valuable combination of properties, PCNs are used as high-temperature adhesives, sealants, compounds, and polymer matrices for composite materials in modern industries such as microelectronics, aerospace, automotive manufacturing, etc.Currently, the creation of thermally stable nanocomposites based on PCNs for special purposes constitutes a particular scientific interest, as the use of nanofillers of various chemical nature and functionality for the molecular design of reactive CERs in developing functional nanocomposites allows for a significant diversification of their physical-chemical properties and expansion of their application areas.As far as we know from the literature, promising nanofillers such as fullerenes, which have ultra-high thermal stability (for 60 , the critical decomposition