▎ 摘　　要

NOVELTY - A natural rubber is prepared by preparing modified graphene, plasticating natural rubber, ethylene propylene diene rubber (EPDM), neoprene, and melamine formaldehyde resin, adding e.g. Silane coupling agent KH-792 (RTM: N-2-(aminoethyl)-3-aminopropyltrimethoxysilane), stirring, adding e.g. decabromdiphenylethane in mixer, stirring, adding Antioxidant D-50 (RTM: Rubber antioxidant) and antioxidant SP (RTM: Execellent protective agent), mixing, adding sulfur peroxide, mixing, kneading, cooling, and discharging. USE - Preparation of modified natural rubber (claimed). ADVANTAGE - The material has good elasticity, high strength, excellent shock resistance, and is flame retardant. DETAILED DESCRIPTION - A modified natural rubber is prepared by preparing 55-58 pts. wt. natural rubber, 25-30 pts. wt. EPDM, 8-12 pts. wt. neoprene, 7-10 pts. wt. melamine formaldehyde resin, 1.2-1.5 pts. wt. Silane coupling agent KH-792, 28-32 pts. wt. modified graphene, 18-22 pts. wt. hard clay, 14-17 pts. wt. zeolite powder, 4-8 pts. wt. alumina, 5-7 pts. wt. calcite, 6-10 pts. wt. carbon black, 11-15 pts. wt. quartz powder, 8-10 pts. wt. diethyl phthalate, 2-5 pts. wt. cresyl diphenyl phosphate, 4-8 pts. wt. decabromodiphenylethane, 3-6 pts. wt. antimonous oxide, 6-9 pts. wt. sulfur peroxide, 1.4-1.7 pts. wt. Antioxidant D-50, 1.8-2.2 pts. wt. Antioxidant SP, and natural rubber having moisture content of 6-9%, adding 120-125 pts. wt. of 95-98 wt.% sulfuric acid in reaction container, placing in water bath at - 3-3 degrees C, stirring at 14-17 rpm for 22-25 minutes, adding 12-15 pts. wt. graphite powder and 6-10 pts. wt. sodium nitrate in which 90-95% of mixture has particle size of 20-30 mu m, adding 24-27 pts. wt. potassium permanganate, placing in water bath at 30-35 degrees C for 26-30 minutes, adding 450-470 pts. wt. deionized water, placing in water bath at 95-98 degrees C, stirring for 16-20 minutes, continuously adding 15-18 pts. wt. of 32-35 wt.% hydrogen peroxide and 0.1-0.13 pt. wt. of 34-37 wt.% hydrochloric acid solution to obtain reaction liquid (A), adjusting pH to 6.9-7, drying to obtain graphene oxide, placing 3-5 pts. wt. graphene oxide in 900-950 pts. wt. deionized water, magnetically stirring for 1.5-2.2 hours to obtain 1.5-1.8 mg/ml graphene oxide solution, magnetically stirring at 800-900 W and 1400-1600 rpm, centrifuging at 8100-8200 rpm for 5-8 minutes to obtain solution (B), adding 100-120 pts. wt. sodium deoxycholate, stirring at 95-110 rpm for 35-38 minutes, adding 0.09-0.12 pt. wt. of 75-78 wt.% hydrazine hydrate solution, placing in oil bath at 80-85 degrees C for 12-15 hours to obtain solution (C), placing in vacuum filtration device with nylon membrane having aperture of 0.22-0.28 mu m, filtering for 23-27 minutes, vacuumizing at 60-65 MPa to obtain modified graphene, preheating mixer at 80-85 degrees C, adding natural rubber, ethylene propylene diene rubber, neoprene, and melamine formaldehyde resin, stirring at 200-220 rpm for 31-34 minutes to obtain rubber material (D), plasticating in triangular bag for 6-9 times, adding Silane coupling agent KH-792, modified graphite, hard clay, zeolite powder, aluminum oxide, calcite, carbon black, and quartz powder, stirring at 180-200 rpm for 20-25 minutes to obtain mixed material (E), adding diethyl phthalate, cresyl diphenyl phosphate, decabromdiphenylethane, and antimonous oxide in mixer, stirring at 100-120 rpm for 18-22 minutes, adding Antioxidant D-50 and Antioxidant SP, continuously mixing for 16-20 minutes, adding sulfur peroxide, mixing at 120-125 rpm for 22-25 minutes, kneading at 150-155 degrees C for 7-10 minutes, cooling for 24-28 hours, and discharging.