Radiation crosslinking poly meth acryl imide foam and preparation method thereof

The invention discloses a radiation crosslinking poly meth acryl imide foam and a preparation method thereof. The preparation method of the radiation crosslinking poly meth acryl imide foam comprisesthe following steps of (1) uniformly mixing raw materials, then injecting into a sealed plane mould, and carrying out polymerization reaction at 30 to 60 DEG C; (2) reacting until reaction liquid is solidified, and after becoming a uniform transparent state, warming to 60 to 130 DEG C, and then carrying out post polymerization treatment for 20 to 60h so as to obtain a poly (meth) acryl imide prepolymerization plate; (3) heating and foaming the poly (meth) acryl imide prepolymerization plate at 180 to 260 DEG C, and obtaining a poly (meth) acryl imide foam; and (4) carrying out double-faced radiation treatment on the poly (meth) acryl imide foam under an electron accelerator, and obtaining the crosslinking poly (meth) acryl imide foam. The poly (meth) acryl imide foam prepared through the invention has remarkably i