| abstract |
The invention discloses a flame-retardant sheet molding compound, a preparation method thereof, a flame-retardant fiber reinforced composite material pressed by the flame-retardant sheet molding compound and a preparation method thereof, and belongs to the field of polymer synthesis and fiber reinforced composite material preparation. The method comprises the following steps: ring-opening reaction of the mono alkyl phosphate to the mono epoxy compound; introducing double bonds and carboxyl functional groups; mixing the vinyl SMC resin with commercially available vinyl resin according to a certain proportion to complete the preparation of the vinyl SMC resin; preparing a sheet according to the formula; and pressing the sheet material on a molding device at high temperature to obtain a finished product. According to the invention, the prepared resin, sheet molding compound and composite material finished products have excellent flame retardant property by adding the polycarboxyl compound containing phosphorus and double bonds into the vinyl resin; due to the excellent flame retardance of the resin, the fiber content of the sheet formula can be increased, the content of the inorganic filler can be reduced, and the performance of the final composite material product is obviously improved compared with that of the traditional SMC product. |