Preparation method of epoxidized 1, 2-polybutadiene
A technology of polybutadiene and epoxidation, which is applied in the field of preparation of epoxidized 1,2-polybutadiene, and can solve problems such as unseen technical indicators of polybutadiene
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Embodiment 1
[0019] Put 15g of polybutadiene and 200ml of cyclohexane into a 500ml three-necked bottle, and wait until the polybutadiene is completely dissolved at 65°C, slowly add 3.2g of formic acid and 0.6g of polyethylene glycol into the system, after the dropwise addition is completed Reflect for another 0.5 hours, slowly add 3.2g of hydrogen peroxide dropwise into the system within 20 minutes, continue the reaction at constant temperature for 2 hours, after the reaction is completed, pour out the product, add absolute ethanol to precipitate the solid, and settle for a period of time , filtered with suction, washed the product solid several times with sodium bicarbonate solution and distilled water, and put it into an oven at 60°C for 12 hours in vacuum to obtain a white tough product.
Embodiment 2
[0021] Put 15g of polybutadiene and 200ml of cyclohexane into a 500ml three-necked bottle, and wait until the polybutadiene is completely dissolved at 65°C, slowly add 1.8 formic acid and 0.3g of polyethylene glycol into the system, and then After 0.5 hours of reaction, slowly add 1.8g of hydrogen peroxide dropwise into the system within 20 minutes, and continue to react for 2 hours at a constant temperature. Suction filter, wash the product solid several times with sodium bicarbonate solution and distilled water, put it into an oven at 60°C for 12 hours in vacuum to obtain a white tough product.
Embodiment 3
[0023] Put 10g of polybutadiene and 150ml of cyclohexane into a 500ml three-necked bottle, and wait until the polybutadiene is completely dissolved at 65°C, slowly add 3.2 formic acid and 0.6g of polyethylene glycol into the system, and then After 0.5 hours of reaction, 3.2g of hydrogen peroxide was slowly added dropwise to the system within 20 minutes, and the reaction was continued for 2 hours at a constant temperature. Suction filter, wash the product solid several times with sodium bicarbonate solution and distilled water, put it into an oven at 60°C for 12 hours in vacuum to obtain a white tough product.
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