环氧树脂阻燃改性研究进展OA

Epoxy resin is one of the most common thermosetting polymers,offering excellent chemical resistance and adhesion,and is therefore widely used in many engineering fields and in daily life.However,its inherent flammability limits its applications in electronics and composites.Incorporating reactive flame retardant additives can significantly improve the fire performance of epoxy resins.Reactive flame retardant epoxies have consequently become a focal point of research because they combine good flame retardancy with high thermal stability and satisfactory mechanical properties.The article outlines the main flame retardant mechanisms of epoxy resins from both gas-phase and condensed-phase perspectives.Reactive flame retardant epoxies are classified into halogen-,phosphorus-,nitrogen-,silicon-,boron-,multi-element-and bio-based systems.The article summarizes recent advances in the use of active flame retardants for epoxy modification and provides an outlook on future directions.Further efforts should aim at developing low-cost,easily prepared reactive flame retardants that enable bio-based flame retardant epoxies with simple processing routes and superior mechanical performance.Concurrently,the molecular structure and composition of epoxy resins must be tailored to optimize their degradability as well as their physicochemical properties.