Abstract
Resins based on cyanates and polymethacrylates, possessing interesting thermal, mechanical, fire-retardant and other functional properties, can be easily prepared. They can serve as ideal low-density matrices for composites, offering attractive properties for advanced aeronautical applications. This work discusses various routes to prepare different interpenetrating polymer networks (IPNs) based on cyanate esters or isocyanurate urethane methacrylate networks: a hybrid network comprising flexible segments of polybutylene-glycol-adipate (PBGA), a semi-IPN containing flexible crystalline linear polyurethane (CPU) based on PBGA, a full IPN possessing flexible polyurethane methacrylate (PUMA) based on PBGA, and a full IPN linked with flexible silicone-based isocyanurate urethane methacrylate (IsUMA). We will comment on the above-mentioned systems and compare their thermo-mechanical, mechanical and fire-retardant properties.
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