Polyphenyl ether composite material as well as preparation method and application thereof

Abstract

The invention discloses a polyphenyl ether composite material, which comprises the following components: 100 parts of polyphenyl ether resin; 20-35 parts of a flame retardant; 18 to 32 parts of a toughening agent; the flame retardant is selected from any one or more of a phosphate flame retardant or a phosphate flame retardant; the flexibilizer is selected from any one or more of ethylene propylene rubber, nitrile rubber, butadiene rubber, ethylene-vinyl acetate copolymer, polyolefin elastomer or styrene block copolymer. According to the invention, the appropriate phosphorus-based flame retardant and flexibilizer are selected, matched according to a certain proportion and added into the polyphenyl ether resin, so that the melt flow rate and normal and low-temperature impact strength of the material can be greatly improved while the high flame retardant property of the material is ensured; the problems that the flame retardant property is reduced and the low-temperature toughness is poor due to the fact that polystyrene is used for improving the flowability of the material are effectively solved, and the polyphenyl ether composite material with high flowability, high flame retardant property and high toughness is prepared.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polyphenylene ether composite material and its preparation method and application. Background technique [0002] Polyphenylene ether (PPE) material has excellent insulation performance and heat resistance, and has been widely used in the field of electrical appliances. In actual use, the viscosity of pure PPE material is high and processing is very difficult. At present, it is generally blended with polystyrene (PS) to improve the fluidity of the material, so that it can be processed and applied better. However, the addition of PS will reduce the flame retardancy of the material; at the same time, since both PS and PPE are rigid materials, the glass transition temperature of both is much higher than room temperature, resulting in the toughness of PPE / PS alloy materials at room temperature, especially at low temperature. Difference. In the prior art, the Chinese p...

AI Technical Summary

Problems solved by technology

However, the addition of PS will reduce the flame retardancy of the material; at the same time, since both PS and PPE are rigid materials, the glass transition temperature of both is much higher than room temperature, resulting in the toughness of PPE / PS alloy materials at room temperature, especially at low temperature. Difference

In the prior art, the Chinese patent application CN101805509A improves the normal and low temperature toughness of the system by adding a small amount of polyolefin resin to the polyphenylene ether-polystyrene alloy; Combustion can improve the flame retardant performance of PPE / PS alloy materials, and at the same time improve the normal and low temperature toughness of materials to a certain extent; Meet the requirements for the low temperature toughness of materials in practical applications (the notched impact strength at -40°C is higher than 12kJ / m 2 Only high-quality materials can be better applied to electronic product components used at low temperatures such as connectors, electric control boxes, etc.)

It can be seen that for PPE materials that adjust fluidity by using PS, it is difficult to achieve good low-temperature toughness, which largely limits the application of PPE materials.