Polypropylene composite material with fire retardance and toughening performance

Abstract

The invention discloses a polypropylene composite material with fire retardance and toughening performance, which is characterized in that the composite material is prepared by the following components in percentage by mass through melt blending: 65 to 77 percent of isotactic polypropylene, 20 to 35 percent of ammonium polyphosphate, 5 to 15 percent of polyoxyethylene and organic montmorillonite of which the mass is 1.5 to 3.0 percent of the total mass of the isotactic polypropylene, the ammonium polyphosphate and the polyoxyethylene; the tensile strength of the composite material is in the range of 26.24 to 28.87MPa; the impact strength of the composite material is in the range of 5.34 to 12.97KJ / m2; an oxygen index of the composite material is in the range of 28 to 36 percent; and the vertical combustion performance UL-94 of the composite material is at the V-2 to V-0 grade. The polypropylene blending material provided by the invention has excellent fire retardance and impact resistance, wide raw material resources and simple preparation process, is convenient to operate and is easy for industrial production. Therefore, the obtained polypropylene composite material has low cost.

Description

technical field [0001] The invention belongs to the technical field of polypropylene composite materials, and in particular relates to a polypropylene composite material with both flame retardancy and toughening. Background technique [0002] Polypropylene (PP) is a thermoplastic resin obtained by addition polymerization of propylene. According to the position of the methyl group, it is divided into three types: isotactic polypropylene (iPP), atactic polypropylene and syndiotactic polypropylene. iPP is usually a translucent colorless solid, odorless and non-toxic. Due to the regular structure and high crystallization, the melting point is as high as 167°C, heat-resistant, and the products can be sterilized by steam. The density is 0.90g / cm 3 . Coupled with the advantages of high strength, high hardness, good elasticity, low density, and good heat resistance, iPP has been widely used in various fields such as auto parts, furniture, home appliances, and packaging (Dunshee W...

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Problems solved by technology

Among the charring agents used above, the charring efficiency of starch is not high, and the addition amount is large, which has a great impact on the mechanical properties; TPMP, BCPPO, CFA, CDS, etc. are more efficient than PER, and contain P, Si or N. Elements can endow iPP with higher flame retardancy, but TPMP and CFA are inorganic macromolecules, which are not compatible with iPP, and adding them to iPP will reduce the mechanical properties of the blended material, especially the impact resistance; BCPPO CDS and CDS belong to organic phosphorus-containing or nitrogen-containing compounds. Although they have little effect on mechanical properties and may even improve some properties, they are difficult to synthesize and expensive, so they are difficult to apply on a large scale, and there is no industrial production at present.

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