Preparation method of antistatic copolyester

Abstract

A preparation method of antistatic copolyester comprises the following steps: mixing and grinding fluoride modified lithium manganate, lithium iron phosphate nano-powder, sodium germinate, sodium-based bentonite, ethylene glycol, p-hydroxybenzoic acid and butylene glycol to prepare modified ethylene glycol I; mixing and grinding silane coupling agent modified tin oxide whiskers, conductive potassium titanate whiskers, polyethylene glycol, sodium 5-sulfobis(hydroxyethyl)isophthalate, antimony ethylene glycalate, an antioxidant and ethylene glycol to prepare modified ethylene glycol II; blending and beating the modified ethylene glycol I, ethylene glycol and terephthalic acid, carrying out an esterification reaction, adding the modified ethylene glycol II in the normal pressure esterification-condensation polymerization stage, and further carrying out condensation polymerization to prepare the antistatic copolyester. The modified polyester can obviously improve the antistatic property, the hygroscopic property and other performances of a polyester material, enhances the mechanical performances of the polyester material, and can be widely applied to production of polyester fibers, plastics and films.

Description

technical field [0001] The invention belongs to the technical field of polyester synthesis and modification, and in particular relates to a preparation method of antistatic copolyester. Background technique [0002] Polyester (PET) is a polyethylene terephthalate formed by polycondensation of terephthalic acid and ethylene glycol. It has high hardness, good rigidity, high strength, and toughness. It is widely used Used to make synthetic fibers, plastics, films and other products. However, polyester (PET) macromolecules are bound by covalent bonds, and its polar groups are few, and its crystallinity is high, and its hygroscopicity is poor, which leads to the disadvantages of easy accumulation of static electricity and easy adsorption of dust. The processing or use of PET) products will be adversely affected, so the research on antistatic modification of polyester (PET) endows it with new properties and expands its application range, which has gradually become a hot spot in p...

AI Technical Summary

Problems solved by technology

However, polyester (PET) macromolecules are bound by covalent bonds, and its polar groups are few, and its crystallinity is high, and its hygroscopicity is poor, which leads to the disadvantages of easy accumulation of static electricity and easy adsorption of dust. The processing or use of PET) products will be adversely affected, so the research on antistatic modification of polyester (PET) endows it with new properties and expands its application range, which has gradually become a hot spot in the research of polyester (PET).

[0003] In order to solve the problem of poor antistatic effect of polyester (PET) resin, two methods of surface coating and blending modification are usually used. Surface coating is mainly to apply antistatic components to polyester (PET) by chemical or material action A functional film is formed on the surface of the product, but its durability is poor. The method of blending is mainly to add conductive materials or antistatic materials to polyester (PET) resin in situ or by blending to form antistatic polyester. Commonly used materials include carbon black, graphite, metal powder, metal oxide, etc. This method often results in a decrease in the fluidity and mechanical properties of polyester due to the uneven addition of modifiers, making it difficult to process after molding.