Starch-based plastics and methods for their preparation
A technology of starch-based plastics and raw materials, applied in the field of starch-based plastics and its preparation, can solve the problems of film hardening and brittleness, and achieve the effects of inhibiting recrystallization, overcoming easy hydrolysis, and improving processing fluidity
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Embodiment 1
[0033] (1) Prepare raw materials: 100 parts of 100-mesh cornstarch, 10 parts of plasticizer, 5 parts of modifier, 1 part of auxiliary agent, 35 parts of polyvinyl alcohol;
[0034] The plasticizer is a mixture of addition reaction product and compound plasticizer, and the mixing mass ratio is 1:1; the addition reaction product is glycerol, propylene oxide and water in the catalyst sodium hydroxide and coupling agent The product of the addition reaction of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate; the compound plasticizer is the product of the reaction between methyl formate and diethanolamine.
[0035] The modifier is a mixture of bis(2,6-diisopropylphenyl)carbodiimide and magnesium nitrate hexahydrate at a mass ratio of 1:9.
[0036] The auxiliary agent is a mixture of polycaprolactone, zinc stearate, and magnesium stearate, and the mixing mass ratio is 1:2:2.
[0037] (2) Preparation of starch-based plastics: Mix the raw materials described in step (1) into a...
Embodiment 2
[0039] (1) Prepare raw materials: 100 parts of 800-purpose tapioca starch, 30 parts of plasticizer, 10 parts of modifier, 3 parts of auxiliary agent, 20 parts of polylactic acid, 40 parts of polybutylene succinate;
[0040] The plasticizer is a mixture of an addition reaction product and a compound plasticizer, and the mixing mass ratio is 1:3; the addition reaction product is trimethylolpropane and pentaerythritol, propylene oxide and water in the catalyst acetic acid and coupler. The product of the addition reaction under the action of isopropyl titanate triisostearate; the compound plasticizer is the product of the reaction between ethyl formate and acetamide.
[0041] The modifier is a mixture of triglycidyl isocyanate and polypropylene glycol with a molecular weight of 2000 in a mass ratio of 1:99.
[0042] The auxiliary agent is a mixture of polyethylene glycol with a molecular weight of 400, magnesium hydroxide and erucamide, and the mixing mass ratio is 3:1:2.
[0043...
Embodiment 3
[0045] (1) Prepare raw materials: 100 parts of 300-mesh wheat starch, 20 parts of plasticizer, 1 part of modifier, 5 parts of auxiliary agent, 10 parts of polyhydroxybutyrate;
[0046] The plasticizer is a mixture of an addition reaction product and a compound plasticizer, and the mixing mass ratio is 4:1; The product of the addition reaction under the action of the agent isopropyl trioleic acid acyloxy titanate; the compound plasticizer is the product of the reaction of vinyl acetate and diethanolamine.
[0047] The modifier is a mixture of triglycidyl isocyanate and γ-1,4 butyrolactone at a mass ratio of 1:19.
[0048] The auxiliary agent is a mixture of polyethylene glycol with a molecular weight of 8000 and oleic acid amide, and the mixing mass ratio is 5:1.
[0049](2) Preparation of starch-based plastics: Mix the raw materials described in step (1) into a high-speed mixer, mix at 80°C for 30 minutes, then cool the mixed material to 30°C, and place it at room temperature...
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