Method of toughening polypropylene with compound nucleating agent
The technology of polypropylene and nucleating agent is applied in the field of compound nucleating agent to toughen polypropylene, which can solve the problems of high addition cost, increase the cost of composite materials, reduce the rigidity and transparency of polypropylene, etc., so as to reduce the dosage and improve the toughness. , The effect of toughening effect is obvious
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Embodiment 1
[0027] 1) Adding mass parts in the reactor is 78 parts by mass of polybutadiene latex, 10 parts by mass of methyl methacrylate monomer, 4 parts by mass of sodium pyrophosphate, 3 parts by mass of glucose and 3 ferrous sulfate, under the action of cumene hydroperoxide as an initiator in the number of parts by mass, the above-mentioned substances were grafted and polymerized at 70°C for 6 hours to obtain PB-g-PMMA latex;
[0028] 2) Pour the latex into 15% sulfuric acid solution, adjust the pH to about 5, raise the temperature to 70°C, stir for 30min, and cool to room temperature. High-speed centrifugation to remove water, wash with distilled water, and dry at 50°C for 24 hours to obtain powdered nano-core-shell PB-g-PMMA particles with a particle size of 60-200nm;
[0029] 3) 55.99 parts of random copolymerized polypropylene, 35 parts of syndiotactic homopolymerized polypropylene, 5 parts of nano core-shell PB-g-PMMA particles, 0.01 part of TMB-4 nucleating agent (developed by ...
Embodiment 2
[0032] 1) Adding mass parts in the reactor is 65 parts by mass of polybutadiene latex, 15 parts by mass of methyl methacrylate monomer, 5 parts by mass of sodium pyrophosphate, 7 parts by mass of glucose and 7 ferrous sulfate, under the action of cumene hydroperoxide as an initiator in the number of parts by mass, the above substances were grafted and polymerized at 70°C for 8 hours to obtain PB-g-PMMA latex;
[0033] 2) Pour the latex into 20% sulfuric acid solution, adjust the pH to about 2, raise the temperature to 70°C, stir for 30min, and cool to room temperature. High-speed centrifugation to remove water, wash with distilled water, and dry at 50°C for 24 hours to obtain powdered nano-core-shell PB-g-PMMA particles;
[0034] 3) 70 parts of random copolymerized polypropylene, 20 parts of block copolymerized polypropylene, 4 parts of nano core-shell PB-g-PMMA particles, 0.04 parts of WBG-II nucleating agent (Guangdong Weilinna New Material Technology Co., Ltd. Production, ...
Embodiment 3
[0037] 1) Adding mass parts in the reactor is 80 parts by mass of polybutadiene latex, 5 parts by mass of methyl methacrylate monomer, 5 parts by mass of sodium pyrophosphate, 4 parts by mass of glucose and 4 ferrous sulfate, under the action of cumene hydroperoxide as an initiator in the number of parts by mass, the above-mentioned substances were grafted and polymerized at 70°C for 10 hours to obtain PB-g-PMMA latex;
[0038] 2) Pour the latex into 15% sulfuric acid solution, adjust the pH to about 5, raise the temperature to 70°C, stir for 30min, and cool to room temperature. High-speed centrifugation to remove water, wash with distilled water, and dry at 50°C for 24 hours to obtain powdered nano-core-shell PB-g-PMMA particles;
[0039]3) 60 parts of block copolymerized polypropylene, 30.98 parts of syndiotactic homopolymerized polypropylene, 5 parts of nano core-shell PB-g-PMMA particles, 0.02 parts of TMB-5 nucleating agent (developed by Shanxi Chemical Industry Research ...
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