▎ 摘　　要

NOVELTY - Hard geogrid comprises 1-2 pts. wt. benzyltriphenylphosphonium chloride, 4-6 pts. wt. epoxidized cottonseed butyl oleate, 5-7 pts. wt. graphene oxide, 40-50 pts. wt. p-hydroxybenzoic acid, 10-17 pts. wt. acetic anhydride, 0.08-0.1 pts. wt. zinc acetate, 20-30 pts. wt. 6-hydroxy-2-naphthoic acid, 180-200 pts. wt. high-density polyethylene, 0.1-0.3 pts. wt. manganese isooctanoate, 0.8-1 pts. wt. polyethylene glycol monooleate, 1.6-2 pts. wt. magnesium aluminum silicate, 1-2 pts. wt. formamide, 0.7-1 pts. wt. hydroxystearic acid and 0.4-1 pts. wt. 8-hydroxyquinoline copper. USE - Used as hard geogrid. ADVANTAGE - The geogrid has high surface hardness and good pressure resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing hard geogrid comprising: (i) mixing of 60-70 wt.% acetic anhydride, p-hydroxybenzoic acid with hydroxystearic acid, heating at 138-140 degrees C on oil bath with stirring for 10-15 minutes to obtain the mixture, mixing of 0.01-0.02 wt.% mixture, 96-98% sulfuric acid, reacting for 3-5 hours, discharging, adding1.6-2 times the amount of ice water, allowing for 3-5 minutes, blowing to dry, drying under vacuum oven at 50-60 degrees C for 20-24 hours to obtain acetylated monomer a; (ii) mixing of 6-hydroxy-2-naphthoic acid with remaining acetic anhydride, heating at 120-130 degrees C on oil bath for 3-4 hours, adding 1.6-2 times the amount of ice water, allowing for 3-5 minutes, adding 8-hydroxyquinoline copper, stirring, blowing to dry, drying in vacuum oven at 50-60 degrees C for 20-24 hours to obtain acetylated monomer b; (iii) mixing of benzyltriphenylphosphonium chloride with 27-30 times the amount of anhydrous ethanol, stirring, adding formamide, heating at 57-60 degrees C with stirring for 4-10 minutes, adding magnesium aluminum silicate, manganese isooctanoate, stirring at 100-200 rotations/minute for 18-20 minutes to obtain amide alcohol solution; (iv) mixing of graphene oxide with 100-120 times the amount of anhydrous ethanol, carrying out ultrasonic dispersion for 50-60 minutes, adding amide alcohol solution, stirring, adding acetylated monomers a and acetylated monomer b, carrying out ultrasound treatment for 30-40 minutes and vacuum distillation, stirring at 60-70 degrees C, drying under vacuum for 20-25 hours to obtain monomer pretreated graphene; (v) mixing of pretreated graphene with zinc acetate, placing in a reactor, reacting under nitrogen protection, heating at 240-250 degrees C for 3-4 hours, increasing the temperature to 270-280 degrees C for 1-2 hours, then heating at 290-300 degrees C for 30-40 minutes, cooling the material to obtain graphene copolyester complex material; and (vi) mixing graphene copolyester complex material and remaining raw materials, stirring, extruding in melt extrusion, pressing into sheet by a three-roll press, punching and stretching to obtain the product.