Synthesis method of flame-retarding polymethyl methacrylate

Abstract

The invention provides a synthesis method of flame-retarding polymethyl methacrylate, which includes the steps of: a) dissolving to-be-purified dibenzoyl peroxide in trichloromethane and filtering the impurities away, adding methanol at equal volume until the dibenzoyl peroxide is crystallized and separated out, filtering the mixture, washing the crystal in cold methanol and drying the crystal at room temperature in a vacuum drying box, and storing the crystal in a dark place for later use; b) successively adding triphenyl phosphate, nano ZrO2 and N,N-dimethylaniline to methyl methacrylate in a container according to a formula at room temperature, mixing the re-crystallized dibenzoyl peroxide with the components, sealing the container by a sealing material, and heating the container in a water bath pot at 30 DEG C with stirring; c) when the viscosity of the solution in the container reaches 250 Pa*s and the solution can be smoothly poured out, pouring the solution into a mold prepared before, and waiting for 1 h at 60 DEG C to prepare a test sample. The flame-retarding polymethyl methacrylate has good flame-retarding performances and excellent mechanical performances.

Description

technical field [0001] The invention belongs to the technical field of flame retardant materials, in particular to a method for synthesizing flame retardant polymethyl methacrylate. Background technique [0002] Polymethyl methacrylate (PMMA), commonly known as plexiglass, is a typical colorless and transparent polymer material. It has good transparency, weather resistance, electrical insulation and processing properties, and is widely used in aircraft, automobiles, Construction, electronic devices, advertising lighting and interior decoration, etc., especially in recent years, the rapid development of the electronic product market, the automotive industry, and the solar energy industry are driving the demand for PMMA to grow significantly. PMMA resin will not produce sharp fragments when broken, and the safety factor is very high. The United States, Japan and other countries and places have made mandatory regulations in the law, and the glass used in the construction of pr...

AI Technical Summary

Problems solved by technology

However, the melting point of PMMA is only 130-140°C, which is an extremely flammable material (the oxygen index is only 17.3), and its heat resistance is poor. When PMMA is exposed to high temperature or fire, PMMA will be ignited rapidly and melted. The dripping phenomenon releases a large amount of heat and toxic gas at the same time, which brings a greater fire hazard, threatens the safety of human life and property, and greatly limits the application range of PMMA.

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