A kind of preparation method of azide copolymer modified graphite modified polystyrene-based resin
A nitrided copolymer and polystyrene-based technology is applied in the field of preparation of azide-copolymer modified graphite-modified polystyrene-based resin, which can solve the problems of high product cost, ozone layer destruction, and high product density, and achieve product Stable performance, improved thermal insulation performance, low thermal conductivity
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[0021] A method for preparing azide copolymer modified graphite-modified polystyrene-based resin of the present invention is characterized in that it comprises the following steps.
[0022] a) Styrene pretreatment: washing with 5% sodium hydroxide solution for 3-5 times, washing with deionized water until the pH is around 7, removing water from calcium hydride and distilling under reduced pressure.
[0023] b) Surface modification of graphite: after mixing acryloyl chloride, methyl styrene and brominated styrene in a certain proportion, adding an initiator, and reacting at 60-100° C. for 3-24 hours. Dissolve the prepared copolymer in tetrahydrofuran, react with an aqueous azide solution at -10-5°C for 5-20 hours to obtain an azide copolymer, add the azide copolymer and graphite to N,N-di Stirring in methyl acetamide solvent at 140-160° C. for 1-8 hours to prepare azide-copolymer-modified graphite.
[0024] c) Preparation of styrene-based resin: react the modified graphite, st...
Embodiment 1
[0033] a) Styrene pretreatment: washing 3 times with 5% sodium hydroxide solution by mass percentage, washing with deionized water until the pH is about 7, removing water from calcium hydride and distilling under reduced pressure.
[0034] b) 300 g of acryloyl chloride, 375 g of methyl styrene, 75 g of brominated styrene, and 2 g of azobisisobutyronitrile were reacted at 70° C. for 3 h to prepare a copolymer. 600 g of the prepared copolymer was dissolved in 1000 ml of tetrahydrofuran, and reacted with 300 ml of a 30% sodium azide aqueous solution at -8°C for 12 h, and the azide copolymer was obtained after removing the solvent. Dissolve 500g of azidated copolymer in 800ml of N,N-dimethylacetamide solvent, add 50g of graphite and stir at 149°C for 3h, remove the solvent, and obtain azidized copolymerized modified graphite.
[0035] c) 50g of modified graphite prepared by step b), 9.0kg styrene monomer (inhibitor), 0.94kg methyl methacrylate, and 10g azobisisobutyronitrile were ...
Embodiment 2
[0039] a) Styrene pretreatment: washing 3 times with 5% sodium hydroxide solution by mass percentage, washing with deionized water until the pH is about 7, removing water from calcium hydride and distilling under reduced pressure.
[0040] b) React 150 g of acryloyl chloride, 150 g of methyl styrene, 75 g of brominated styrene, and 2 g of azobisisobutyronitrile at 60° C. for 15 h to prepare a copolymer. 250 g of the prepared copolymer was dissolved in 200 ml of tetrahydrofuran, and reacted with 400 ml of 25% sodium azide aqueous solution at -10° C. for 18 h, and the azide copolymer was obtained after removing the solvent. Dissolve 250g of azidated copolymer in 200ml of N,N-dimethylacetamide solvent, add 100g of graphite and stir at 140°C for 8h, remove the solvent, and obtain azidized copolymerized modified graphite.
[0041] c) Add 150 g of the modified graphite prepared in step b), 7 kg of styrene monomer, 3 kg of ethyl methacrylate, and 10 g of azobisisobutyronitrile into t...
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