A kind of degradable environment-friendly plastic film and preparation method thereof
A plastic film and environmental protection technology, applied in the field of degradable and environmentally friendly plastic film and its preparation, can solve the problems of difficult casting and molding, uncontrollable degradation, incomplete degradation, etc., and achieve easy processing and molding, simple and easy preparation method, and low price Effect
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Embodiment 1
[0031] A preparation method of a degradable environmentally friendly plastic film, comprising the steps of:
[0032] 1) 200g of rapeseed oil, 1,3-bis(oxiranylmethyl)-5-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H ,5H)-Triketone 100g, azobisisobutyronitrile 1g dissolved in dimethyl sulfoxide 600g, under nitrogen atmosphere, stirred and reacted at 60°C for 1 hour, then precipitated in acetone, and then placed at 60°C Bake in a vacuum oven for 6 hours;
[0033] 2) Dissolve 90 g of the copolymer prepared in step 1) in 300 g of dimethyl sulfoxide, add 30 g of chitosan therein, stir and react at 70° C. for 5 hours, then precipitate in ethanol, and place Bake in a vacuum oven at 60°C for 10 hours;
[0034] 3) Under nitrogen protection, 80 g of the chitosan-grafted copolymer prepared in step 2) was dissolved in 400 g of N,N-dimethylformamide, and furan-2,5 dicarboxylic acid was added thereto 40g and 40g of catalyst, placed in a reaction kettle, stirring the esterification reaction at a ...
Embodiment 2
[0038] A preparation method of a degradable environmentally friendly plastic film, comprising the steps of:
[0039] 1) 230g of olive oil, 1,3-bis(oxiranylmethyl)-5-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H, 100g of 5H)-triketone and 1.2g of azobisisoheptanonitrile were dissolved in 700g of N,N-dimethylformamide, stirred and reacted at 63°C for 1.5 hours under an argon atmosphere, and then precipitated in acetone. Then place it in a vacuum drying oven at 65°C for 6.5 hours;
[0040]2) Dissolve 110 g of the copolymer prepared in step 1) in 450 g of dimethyl sulfoxide, add 50 g of chitosan therein, stir and react at 73° C. for 5.5 hours, then precipitate in ethanol, and place Bake in a vacuum oven at 65°C for 10.5 hours;
[0041] 3) Under nitrogen protection, 90 g of the chitosan-grafted copolymer prepared in step 2) was dissolved in 550 g of N,N-dimethylformamide, and furan-2,5 dicarboxylic acid was added thereto 45g and 40g of catalyst, placed in a reaction kettle, stirring t...
Embodiment 3
[0045] A preparation method of a degradable environmentally friendly plastic film, comprising the steps of:
[0046] 1) 250g walnut oil, 1,3-bis(oxiranylmethyl)-5-(2-propenyl)-1,3,5-triazine-2,4,6(1H,3H, 100g of 5H)-triketone and 1.5g of azobisisobutyronitrile were dissolved in 800g of N-methylpyrrolidone, stirred and reacted at 65°C for 2 hours under a neon atmosphere, then precipitated in acetone, and then placed at 70 Bake in a vacuum oven at ℃ for 7 hours;
[0047] 2) Dissolve 125g of the copolymer prepared in step 1) in 580g of dimethyl sulfoxide, and add 55g of chitosan therein, stir and react at 76°C for 6 hours, then precipitate in ethanol, and then place Bake in a vacuum oven at 72°C for 11 hours;
[0048] 3) Under nitrogen protection, 100 g of the chitosan-grafted copolymer prepared in step 2) was dissolved in 620 g of N,N-dimethylformamide, and furan-2,5 dicarboxylic acid was added thereto 63g and 40g of catalyst are placed in a reaction kettle, and the esterific...
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