Polyether-ether-ketone resin as well as preparation method and application thereof

Abstract

The invention discloses a preparation method of polyether-ether-ketone resin, and the method comprises the following steps of: adding solvent sulfolane, 4, 4'-DFBP and carbonate / bicarbonate into a reaction container under the condition that protective gas is introduced, heating the reaction container in case of stirring, and discharging moisture and air in a system; after the moisture in the system is completely evaporated, adding hydroquinone and a water-carrying agent in the process of continuously heating, wherein the temperature of the system is 100-200 DEG C; continuously heating, starting water-carrying reaction on the hydroquinone and the carbonate / the bicarbonate to generate the moisture, and continuously taking out the generated moisture by the water-carrying agent, distilling the water-carrying agent after the water carrying is completely carried out, starting polymerization reaction when the temperature reaches 245-265 DEG C, and stopping reaction after 1-5 hours. The invention further discloses polyether-ether-ketone prepared by the method, and an application of the prepared polyether-ether-ketone in a composite material.

Description

[0001] technical field [0002] The invention belongs to the field of chemical polymer materials, and in particular relates to a preparation method of polyetheretherketone resin, polyetheretherketone resin prepared by the method, and the application of the prepared polyetheretherketone resin. [0003] Background technique [0004] Polyaryletherketone polymers are special engineering plastics with various excellent properties such as high temperature resistance, high strength, and radiation resistance. After the polyether ether ketone (PEEK) product was launched by the British ICI company in 1981, it has been developing at a relatively fast speed for nearly 30 years, but all of them use diphenyl sulfone as the solvent. Since the solvent is insoluble in water, it must be used first. Solvents (such as acetone, ethanol, etc.) are extracted multiple times to remove the solvent diphenyl sulfone, and then extracted with water for multiple times to remove by-product salts and obtai...

AI Technical Summary

Problems solved by technology

However, since sulfolane is a polar solvent, its polymerization rate is higher than that of a non-polar solvent such as diphenyl sulfone, and sulfolane is very easy to contain a certain amount of water, which often affects the amount of water generated and water carried during the polymerization process. Effect

In addition, as we all know, for the binary polycondensation reaction, the most important factor affecting the viscosity of the polymerization product is the molar ratio of the monomer, and the allowable fluctuation range of this ratio is in a very narrow range. With the continuous evaporation of water in the water agent and the system, the polymerized monomers, especially hydroquinone, are easily volatilized and taken out of the system if they are fed too early, which will seriously affect the accuracy of the molar ratio, and ultimately make it more difficult for the viscosity to increase. control

At the same time, due to the higher activity of this system than the diphenyl sulfone system, side reactions such as oxidative deterioration are more likely to occur in the system, such as hydroquinone to generate dark quinones, resulting in a darker resin color

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