The preparation method of polymethyl methacrylate
A technology for polymethyl methacrylate and polymerization reaction, which is applied in the field of preparation of polymethyl methacrylate, can solve the problems of harsh polymerization reaction conditions and complicated preparation of initiators, and achieve high yield of polymerization products, simple preparation, The effect of mild polymerization conditions
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Embodiment 1
[0023] Add 20ml of refined tetrahydrofuran, 0.1g of diphenyl sulfoxide, 0.1g of epichlorohydrin and 0.5ml of 1MBF in a three-necked flask equipped with a stirring bar. 3 solution, stirred at room temperature for 25 minutes, then added 0.5ml1MBF 3 solution, 0.13gAlCl 3 Add the solution dissolved in 5.15g of methyl methacrylate into a three-necked flask, keep the system temperature at 30°C, and after 72 hours of reaction, add 20ml of acetone, and add 2ml of an aqueous solution with a mass fraction of 10% NaOH under stirring. The reaction was terminated after stirring at 20°C for 50 minutes. When the system was cooled to room temperature, 50 ml of methanol was added to precipitate the polymer. The polymer is then isolated. Dry under vacuum at 40 °C. The resulting polymer yield was 93%. In the gel permeation chromatography (GPC) test using polystyrene as a standard sample and tetrahydrofuran (THF) as a mobile phase, polymethyl methacrylate was obtained with a number average mo...
Embodiment 2
[0025] Add 15ml of refined tetrahydrofuran, 0.1g of diphenyl sulfoxide, 0.1g of propylene oxide and 0.5ml of 1MBF in a three-necked flask equipped with a stirring bar. 3 solution, stirred at room temperature for 25 minutes, then added 0.5ml1MBF 3 solution, 0.11gAlCl 3 Add the solution dissolved in 5.06g of methyl methacrylate into a three-necked flask, keep the system temperature at 30°C, and after reacting for 96 hours, add 20ml of acetone, and add 2ml of NaHCO solution dropwise under stirring. 3 The mass fraction is 10% aqueous solution, and the reaction is terminated after stirring at 50° C. for 30 minutes. When the system was cooled to room temperature, 50 ml of methanol was added to precipitate the polymer. The polymer is then isolated. Dry under vacuum at 40 °C. The resulting polymer yield was 62.4%. In the gel permeation chromatography (GPC) test using polystyrene as a standard sample and tetrahydrofuran (THF) as a mobile phase, polymethyl methacrylate was obtained ...
Embodiment 3
[0027] Add 20ml of refined tetrahydrofuran, 0.1g of diphenyl sulfoxide, 0.15g of epoxy styrene and 0.5ml of 1MBF in a three-necked flask equipped with a stirring bar. 3 Solution, after stirring at room temperature for 25 minutes, 0.26gAlCl 3 A solution dissolved in 5.16 g of methyl methacrylate was added to a three-necked flask. Keep the system temperature at 30°C. After reacting for 96 hours, add 20ml of acetone, add 2ml of an aqueous solution containing KOH with a mass fraction of 10% dropwise under stirring, and stop the reaction after stirring at 20°C for 60 minutes. When the system was cooled to room temperature, 50 ml of methanol was added to precipitate the polymer. The polymer is then isolated. Dry under vacuum at 40 °C. The resulting polymer yield was 37.1%. In the gel permeation chromatography (GPC) test using polystyrene as a standard sample and tetrahydrofuran (THF) as a mobile phase, polymethyl methacrylate was obtained with a number average molecular weight of...
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