Ternary copolymerization perfluoropolyether and preparation method thereof
A technology for ternary copolymerization of perfluoropolyether and perfluoropolyether, which is applied in the field of polymer material synthesis, can solve problems such as difficulty in meeting usage requirements, and achieve the effects of increasing viscosity index, low cost and lowering pour point
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Embodiment 1
[0026] The preparation method steps of the ternary copolymerized perfluoropolyether of this embodiment are as follows:
[0027] (1) Add 1.52g (0.01mol) of CsF and 4.45g (0.02mol) of tetraethylene glycol dimethyl ether to the dry low-temperature pressure-resistant polymerization reactor respectively, and then start stirring and low-temperature circulating bath; After reaching -35°C, first add 100.51g (0.67mol) of pure hexafluoropropylene into the reactor, and then add pure hexafluoropropylene oxide, tetrafluoroethylene oxide and perfluorooxetane respectively Monomer, wherein the molar ratio of the three monomers is 1:50:30, the total molar weight is 0.61mol, and the total mass is 83g. After the feeding is completed, the reaction is continued for 16h; after the reaction is completed, the reaction system is slowly raised to room temperature, and passed The catalyst in the reaction solution is removed by centrifugation, and the solvent and diluent in the reaction solution are remo...
Embodiment 2
[0034] The preparation method steps of the ternary copolymerized perfluoropolyether of this embodiment are as follows:
[0035] (1) Add 0.42g (0.01mol) of newly prepared NaF and 4.45g (0.02mol) of tetraethylene glycol dimethyl ether to the dry low-temperature pressure-resistant polymerization reactor, and then start stirring and low-temperature circulating bath; the reaction system After the temperature dropped to -31°C, add 5.62g (0.03mol) of pure 1,1,2-trifluorotrichloroethane to the reaction kettle, and then add pure hexafluoropropylene oxide, tetrafluorocyclo Oxyethane and perfluorooxetane monomers, wherein the molar ratio of the three monomers is 13:25:28, the total molar mass is 0.27mol, and the total mass is 40g, and the reaction is continued for 12h after the feeding is completed; the reaction is completed , the reaction system is slowly raised to room temperature, and the catalyst in the reaction solution is removed by centrifugation, and the solvent and diluent in th...
Embodiment 3
[0042] The preparation method steps of the ternary copolymerized perfluoropolyether of this embodiment are as follows:
[0043](1) Add 1.52g (0.01mol) of newly prepared CsF and 2.68g (0.02mol) of diethylene glycol dimethyl ether to the dry low-temperature pressure-resistant polymerization reactor, and then start stirring and low-temperature circulating bath; the reaction system After the temperature drops to -30°C, add 28.11g (0.15mol) of pure 1,1,2-trifluorotrichloroethane to the reaction kettle, and then add pure hexafluoropropylene oxide, tetrafluorocyclo Oxyethane and perfluorooxetane monomers, wherein the molar ratio of the three monomers is 30:1:16, the total molar mass is 0.30mol, and the total mass is 50g. After the feeding is completed, the reaction is continued for 15h; the reaction is completed , the reaction system is slowly raised to room temperature, and the catalyst in the reaction solution is removed by centrifugation, and the solvent and diluent in the reactio...
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