Halogen-free flame-retardant thermal-contraction material and method for preparing same

Abstract

The invention relates to a halogen-free flame-retardant thermal-contraction material and a method for preparing the same, and belongs to the technical field of intelligent materials. The halogen-freeflame-retardant thermal-contraction material and the method have the advantages that an appropriate quantity of ethylene-1-octene copolymers are added into ethylene-vinyl acetate copolymers, equivalently, flexible chains are introduced, accordingly, the toughness and the processability of the halogen-free flame-retardant thermal-contraction material can be improved, and the irradiation dose can beappropriately reduced; the ethylene-vinyl acetate copolymers are combined with maleic anhydride grafted polyethylene, surface hydrophilic groups are easy to act on the surfaces of particles of flameretardants and can be wound around the particles, and accordingly dispersion of the particles in polymer matrixes can be promoted, hydrophobic groups are wound on polymer base materials by the aid ofVan der Waals force or are physically wound on the polymer base materials, accordingly, the polymer matrixes and the ultrafine particles of the flame retardants are connected with one another and are'bridged' with one another, and the interfacial bonding strength can be improved; perfect interfacial tension can be applied to the inorganic flame retardants and the polymer matrixes under 'bridged'effects, accordingly, stress and strain can be effectively transmitted and distributed between two phases by composite material systems, and the performance of composite systems can be improved.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant heat-shrinkable material and a preparation method thereof, belonging to the technical field of intelligent materials. Background technique [0002] Heat-shrinkable materials, also known as polymer shape memory materials, are intelligent materials that combine polymer materials with radiation processing technology. Ordinary polymer materials usually have a linear structure. After being irradiated by a radioactive source such as an electron accelerator and becoming a network structure, these materials will have a unique "memory effect". The expanded, cooled and shaped materials can shrink and recover after being heated. original shape. Since its development in the middle of the 1950s, heat-shrinkable materials have become important functional materials, widely used in the sealing and anticorrosion of chemical and petroleum pipelines, the insulation protection of household appliances, control cables...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Most of the currently developed flame-retardant heat-shrinkable materials contain halogen. Although they have a certain flame-retardant effect, when a fire occurs, the burned heat-shrinkable materials will still produce toxic Gas and smog, which not only affect the smooth progress of disaster relief work, but also cause "second disasters" to life and property, provide a halogen-free flame-retardant heat-shrinkable material and its preparation method

Images