Nitrogen-phosphorus-silicon modified graphene halogen-free flame retardant polymer composite material and preparation method thereof

Abstract

The invention belongs to the technical field of macromolecular materials, and relates to a nitrogen-phosphorus-silicon modified graphene halogen-free flame retardant polymer composite material and a preparation method thereof, wherein the composite material is prepared from the following substances in parts by weight: 60-90 parts of a polymer, and 10-40 parts of a nitrogen-phosphorus-silicon modified graphene flame retardant. All the components are weighed according to the weight percentage and are mixed uniformly, and then the mixture is added into a twin-screw extruder, melted and mixed andthen subjected to injection molding into corresponding sample strips by an injection moulding machine, or the mixture is melted and blended by an internal mixer and is subjected to compression moulding forming by a mould with a certain size on a plate vulcanizing machine, or a method of solidifying moulding by a curing agent is adopted. The nitrogen-phosphorus-silicon modified graphene halogen-free flame retardant polymer composite material provided by the invention has the advantages of high charring property, and excellent flame retardancy and thermal stability, and can be applied to flame retardancy of materials such as electric cables, automobiles and packages.

Description

technical field [0001] The invention belongs to the technical field of flame retardancy, and in particular relates to a method for preparing a nitrogen-phosphorus-silicon modified graphene halogen-free flame-retardant polymer composite material. Background technique [0002] Compared with metal materials and inorganic non-metallic materials, organic polymer materials have the characteristics of low density, chemical resistance, low density, light weight, large adjustable range of physical properties, and easy forming and processing. They have been widely used in the national economy and All areas of people's lives have become one of the materials with the largest volume output. From 2006 to 2014, the average growth rate of the output of polymer products of enterprises above designated size in my country was 16%. However, unlike metals and inorganic non-metallic materials, polymers are generally composed of organic elements such as carbon and hydrogen. The high carbon / hydroge...

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Problems solved by technology

[0008] However, the flame retardant polymer materials prepared in many documents including the above-mentioned reports have problems of poor dispersion of flame retardants and compatibility with the matrix, large addition amount, and precipitation of flame retardants; some systems also use halogenated retardants. Combustible agent, producing a large amount of smoke, toxic and harmful, harmful to human health and the environment

In addition, some systems still have problems such as complex preparation process, high cost, and difficulty in large-scale production.

It is worth noting that there is currently no literature report on the use of environmentally friendly halogen-free flame retardants such as nitrogen, phosphorus, silicon grafted modified graphene and its derivatives.

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