Thermal oxidation stable polyformaldehyde preparation method

Abstract

The invention discloses a thermal oxidation stable polyformaldehyde preparation method, and belongs to the technical field of chemical industry. According to the method, an aluminum alloy and cellulose acetate are compounded to prepare composite metal resin, cutting grains are extruded and grinded into compound aluminum resin powder, and the compound aluminum resin powder and the cellulose acetateare dissolved by diethyl ether in the polymerization process to form a porous aluminum base material. According to the method, rice hulls can be activated through reaction by zinc powder and iron powder at high temperature, lignocellulose components are swelled and gradually transformed into a gummy matter under the action of organic metal solution, the recrystallization temperature of aluminum alloy can be increased by manganese, recrystallization grains are thinned, growth of the thinned recrystallization grains is hindered by compound dispersoid particles, so that the aluminum alloy acquires more force bearing points when external acting force is applied on the aluminum alloy, the aluminum alloy is dispersed, ferromanganese iron metal elements are added into the aluminum alloy, montmorillonoid is adsorbed on gaps of the aluminum alloy, the aging effect of ultraviolet light on polyformaldehyde is reduced, and the mechanical property of the polyformaldehyde is improved.

Description

technical field [0001] The invention discloses a method for preparing thermal oxygen stable polyoxymethylene, which belongs to the technical field of chemical industry. Background technique [0002] POM is also known as acetal resin; polyoxymethylene. The full name is polyoxymethylene resin, referred to as polyoxymethylene, a thermoplastic crystalline polymer. Known as "Super Steel" or "Sai Steel". The English abbreviation is POM. The polymer obtained by formaldehyde polymerization has a low degree of polymerization and is easily depolymerized by heat. POM is a tough and elastic material, which has good creep resistance and geometric stability even at low temperatures. POM has both homopolymer and copolymer materials. Both homopolymer and copolymer materials are crystalline materials and are not easy to absorb moisture. At a lower cost than many other engineering plastics, POM is replacing some markets traditionally occupied by metals, such as replacing zinc, brass, al...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is aimed at the poor thermal stability of polyoxymethylene at present, and it is easy to degrade under the action of light, especially ultraviolet rays and oxygen during use, resulting in a sharp decline in its mechanical properties, especially impact toughness and elongation at break. The defect of losing use value early provides a kind of preparation method of thermal oxygen stable polyoxymethylene