Polypropylene composite material and preparation method thereof

Abstract

The invention relates to a polypropylene composite material and a preparation method thereof, and belongs to the technical field of polymer materials. The polypropylene composite material comprises, by weight, 40-98 parts of , 0-25 parts of a toughening agent, 0-30 parts of fillers, 0.5-3 parts of surface modifier processed non-oxidative modified carbon black and an auxiliary, wherein the specificsurface area of the non-oxidative modified carbon black is lower than or equal to 170 m<2> / g, the oil absorbing value is greater than or equal to 70 mL / 100 g, the high-temperature volatile content islower than 0.3%, and the auxiliary comprises 0.1-0.6 part of an antioxidant. According to the method, the adverse influence on the thermal oxidation ageing resisting performance of the polypropylenecomposite material by the carbon black can be effectively reduced by adopting a processed specific carbon black, the using amount of the antioxidant in a product is reduced to reduce cost and reduce the precipitation risk, and the prepared polypropylene composite material can meet higher demands on thermal oxidation ageing by normal automotive interiors and has the advantage of stable thermal oxidation ageing resisting performance.

Description

technical field [0001] The invention relates to a polypropylene composite material and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] In order to improve the thermal and oxidative aging resistance of the material, Chinese patent CN102604209A uses a nucleating agent as a modified component. The nucleating agent can refine the polypropylene spherulites, make the crystals more uniform, regular, and increase the crystallinity, thereby effectively The lattice defects of the matrix are reduced, and oxygen is prevented from freely diffusing from the surface of the sample to the inside, thereby improving the thermal-oxidative aging resistance; CN102827422A makes polypropylene form a β-crystal form by adding a β-nucleating agent, and the addition of a grafting aid improves the The interfacial compatibility of polypropylene and inorganic fillers prevents the free diffusion of oxygen from the surface of the sample to t...

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Problems solved by technology

[0003] However, in the method disclosed in the above patent, the prepared polypropylene material has no color, and most of the interior and exterior materials used in automobiles and the functional parts around the engine are mainly black. Practice shows that the addition of the colorant carbon black Has a very significant effect on the thermal-oxidative aging properties of polypropylene

Secondly, commercial polypropylene products usually have nucleating agents added, and the nucleating agents added during the formulation optimization process generally have limitations in improving the crystal form of polypropylene.

Furthermore, the method of compounding antioxidants through intercalation agents has a certain degree of operational complexity in operation.

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