Creep-resistant polypropylene composite material

Abstract

The invention discloses a creep-resistant polypropylene composite material which is prepared from the following components in parts by weight: 23-96.8 parts of polypropylene, 1-30 parts of glass fibers, 1-20 parts of diisopropylbenzene peroxide, 1-5 parts of polypropylene grafted with maleic anhydride, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant and 0-20 parts of a filler. With the addition of the glass fibers and the filler in the material, the rigidity of the material can be provided; with addition of diisopropylbenzene peroxide, the polypropylene material can be partially cross-linked, and the creep resistance of the polypropylene material is greatly improved. The material still maintains small deformation degree under long-term stress.

Description

Technical field: [0001] The invention belongs to the field of processing and modification of polymer materials, and in particular relates to a creep-resistant polypropylene composite material. Background technique: [0002] Polypropylene (PP) is one of the fastest-growing plastic varieties in the plastic industry. It has the advantages of good mechanical properties, light specific gravity, non-toxicity, easy processing, and corrosion resistance; and because polypropylene has a wide range of raw materials and low prices, Therefore, it has been widely used in the fields of home appliances, automobiles, and packaging, especially in the fields of automobiles, electric tools, and home appliances. At present, the competition in the field of polypropylene is very fierce, but the added value of domestically produced polypropylene resin is generally low, so it is necessary to modify polypropylene to make polypropylene develop in the direction of engineering plastics. [0003] Howeve...

AI Technical Summary

Problems solved by technology

[0003] However, due to the structural limitations of PP resin itself, such as relatively regular molecular chains and soft molecular chains, its creep resistance is poor.

When used in some applications such as automobiles and electric tools, polypropylene is usually assembled with metal, and polypropylene with poor creep resistance will cause creep to cause permanent deformation under pressure, resulting in assembly gap deformation. Large, and even some functional parts will be loosely assembled, causing safety problems

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