High-heat-resistance halogen-free flame-retardant polyphenyl ether composite material and preparation method thereof

Abstract

The invention discloses a high-heat-resistance halogen-free flame-retardant polyphenyl ether composite material and a preparation method thereof. The composite material is prepared from, by weight, 30-50% of polyphenyl ether, 15-50% of syndiotactic polystyrener, 10-40% of glass fiber, 1-7% of halogen-free flame retardant, 2-6% of compatilizer, 0.4-1.0% of antioxidant and 0.2-1.0% of lubricant. Halogen-free flame retardant is red phosphorus master batches with impact-resistant polystyrene as carriers. High-heat-resistance syndiotactic polystyreneresin, red phosphorus master batches which are high in phosphorus content and small in influence on heat resistance, and glass fiber are selected to conduct halogen-free flame retardant modification on polyphenyl ether, and the high-heat-resistance halogen-free flame-retardant polyphenyl ether composite material can be obtained. In addition, graft with PPO or sPS as substrates is added to serve as compatilizer, and therefore the anti-impact performance of high-heat-resistance halogen-free flame-retardant polyphenyl ether can be improved.

Description

technical field [0001] The invention relates to the technical field of polyphenylene ether composite materials, and more specifically relates to a high heat-resistant halogen-free flame-retardant polyphenylene ether composite material and a preparation method thereof. Background technique [0002] Polyphenylene ether (PPO) has a small relative density, and has a series of excellent properties such as stress relaxation resistance, creep resistance, heat resistance, hydrolysis resistance, water vapor resistance, and dimensional stability. Maintain excellent electrical properties in temperature and frequency range. However, polyphenylene ether is difficult to process due to its high melt viscosity, so other resins, such as polystyrene (PS), nylon (PA), acrylonitrile-butadiene-styrene (ABS), etc. are generally added to improve the processing performance of the material . However, the addition of these resins will significantly reduce the flame retardancy of polyphenylene ether...

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Problems solved by technology

[0004] Although the above inventions provide some beneficial guidance in improving the flame retardancy and heat resistance of polyphenylene ether composites, there are still some deficiencies: (1) acrylonitrile-butadiene-styrene (ABS) and polystyrene The addition of resins such as (PS) significantly reduces the heat resistance of polyphenylene ether; (2) the addition of phosphate flame retardants meets the requirements of green and environmentally friendly halogen-free development, but due to the strong plasticizing effect, it is difficult to improve the resistance At the same time, the heat resistance of the polyphenylene ether composite material is significantly reduced; (3) although polyphenylene sulfide does not reduce the heat resistance of polyphenylene ether, it has poor compatibility with polyphenylene ether, which affects the material's durability. Mechanical behavior

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