A kind of toughened modified cellulose diacetate material and preparation method thereof

Abstract

The invention discloses a toughened modified cellulose diacetate material and a preparation method thereof. The preparation method is to extrude and granulate through a twin-screw extruder, and the formula includes the following components in parts by mass: cellulose diacetate 100 parts, epoxy resin 5-50 parts, camphor 5-20 parts, antioxidant 0.1-1 part. The cellulose diacetate material of the present invention, under the premise of ensuring a certain strength and hardness, has significantly improved toughness and good transparency, and can be used as cellulose diacetate film products by blow molding or solution casting, or can be Produce cellulose diacetate plastic products by melt processing. The preparation method is simple and easy to achieve industrialization, and can be widely used in daily-use plastic products such as eyeglass frames, children's toys, table tennis, films, 3D printing consumables, automobiles and home appliance consumables.

Description

technical field [0001] The invention relates to the field of cellulose diacetate materials, in particular to a toughened and modified cellulose diacetate material and a preparation method thereof. Background technique [0002] Cellulose Acetate (Cellulose Acetate, or cellulose acetate, cellulose acetate), first prepared in 1865, is the acetate of cellulose. Cellulose diacetate refers to a thermoplastic resin obtained by esterifying acetic acid as a solvent and acetic anhydride as an acetylating agent under the action of a catalyst. It is the earliest commercial production of cellulose derivatives and is constantly developing. Cellulose organic acid ester. Cellulose is the main component of green plants. It is rich in resources and has a wide range of sources. It can be produced in large quantities by artificial cultivation. [0003] The cellulose diacetate molecular chain contains a large number of polar groups such as hydroxyl groups and acetyl groups. The molecular chain...

AI Technical Summary

Problems solved by technology

[0003] The cellulose diacetate molecular chain contains a large number of polar groups such as hydroxyl groups and acetyl groups. The molecular chain is rigid, the intermolecular interaction force is relatively large, and the mobility of the molecular chain segments is poor, which endows the cellulose diacetate material with Greater strength and hardness, but also makes the toughness of cellulose diacetate products particularly poor, the elongation at break of pure cellulose diacetate products is less than 10%

However, with the development of science, people found that although the acute toxicity of plasticizers is low, there is almost no acute poisoning performance after human poisoning, but this does not mean that it is safe. On the contrary, its chronic toxicity is quite harmful to humans.

[0005] At the same time, with the increase of the amount of plasticizer in the cellulose diacetate material, the toughness of the material is significantly improved, but its hardness and strength are particularly reduced.

Therefore, the addition of plasticizers has played a certain role in improving the processing technology of cellulose diacetate, but its comprehensive performance is not obvious

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