ABSTRACT
Polyimide (PI) foam belongs to a class of high-performance cellular plastics compared to traditional polyurethane and polystyrene (PS) foams, due to their superior properties such as low dielectric constant, high thermal stability, excellent flame retardancy, less smoke generation and radiation, etc. [1-3]. Because of this, PI foams are employed widely in high-tech applications of aerospace, submarine, and high-speed vehicles.
