A kind of industrial synthesis method of end-capped dendritic polyaryl ether sulfone resin with high thermal stability

Abstract

The invention discloses an industrial synthesis method for high-thermal-stability end capping tree-shaped polyether sulphone resin. The method comprises the steps that in a nitrogen filled protection reaction still, a sulfolane solvent is added, stirring is started, the temperature is raised to 60 DEG C to 80 DEG C, reaction monomers are sequentially added, after all the monomers are dissolved, a salt-forming agent is added, then a water dividing agent is added, stirring continues, and the temperature is raised to 200 DEG C to 210 DE GC; after reacting is carried out for 1-2 hours, the temperature is raised to 220 DEG C to 240 DEG C, a constant-temperature polymerization reaction is carried out for 1-2 hours, a chain extender and an end capping agent are added, the reaction continues to be carried out for 10-50 minutes, and polymerization thick liquid is obtained; the polymerization thick liquid is smashed into powder after being cooled, and the high-thermal-stability end capping tree-shaped polyether sulphone resin is obtained after filtering and drying. The synthesis process is simple, production efficiency is high, ad after the end capping agent is added, the good end capping effect is achieved, and no depolymerization phenomenon happens to the system. After the chain extender is added, higher mechanical strength and lower melt viscosity are achieved, processing and forming are easier, and higher thermal stability is achieved.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, and in particular relates to an industrial synthesis method of high-thermal-stability capped dendritic polyaryl ether sulfone resin. Background technique [0002] Polyaryl ether sulfone is a kind of high-performance engineering plastics, because of their excellent comprehensive properties such as heat resistance, hot water resistance, creep resistance, dimensional stability, impact resistance, chemical resistance, non-toxicity, flame retardancy, etc. Therefore, it has been widely used in the fields of electronics, electrical appliances, machinery, automobiles, medical appliances, food processing and non-stick coatings for a long time. [0003] Industrially important polyarylethersulfones include polyethersulfone (PES) and biphenyl polyethersulfone (PPSU), both of which have very high glass transition temperatures (~220°C). Existing polyarylethersulfones have a production process...

AI Technical Summary

Problems solved by technology

At present, the most commonly used method is additive blending modification, but polysulfone itself is sensitive to additives, which will reduce the service life of the plastic itself while improving performance.

Chinese patent document CN102532899A discloses a physical method of adding titanium dioxide and glass fiber to polyethersulfone and using mechanical blending to improve its comprehensive mechanical properties such as bonding performance and compatibility, but both titanium dioxide and glass fiber will affect the resin. The light transmittance has a certain influence and the impact strength of the resin is significantly reduced

Chinese patent document CN102532899A discloses organosiloxane polyethersulfone resins containing linear and cage-type main chains and a preparation method thereof. By introducing functional molecular structures into the main chain of polyethersulfone, the polyethersulfone hydrophobicity and mediation properties are improved. electrical constant, but the light transmittance of polyethersulfone synthesized by this method is not high, which is mainly limited to the fields of coatings and microelectronic devices

[0005] It can be seen from the above that there are defects in the modification of materials by various existing end-capping agents and chain extenders.

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