High-rigidity and high-heat resistance polypropylene composite material and preparation method thereof

Abstract

The invention discloses a high-rigidity and high-heat resistance polypropylene composite material, which is prepared from the following ingredients in percentage by weight: 40 to 90 of polypropylene, 2 to 20 of powdery polyethylene, 5 to 45 of talcum, 0.1 to 2 of antioxidizers and 0 to 5 of other accessory agents. The powdery polyethylene which can effectively solve the problem of difficult material feeding in a system for preparing the polypropylene composite material is added into a basic recipe of the polypropylene composite material, so the high-rigidity and high-heat resistance polypropylene composite material can be prepared. The invention has the advantages that 1, the dispersing capability of the talcum in the composite material system can be obviously improved through using a proper amount of powdery polyethylene, so the obtained polypropylene composite material maintains the characteristics of high rigidity and high heat resistance; 2, the prepared polypropylene composite material ensures the successful material feeding, and at the same time, each physical-mechanical property is basically not influenced; and 3, the provided method for solving the problem of difficult material feeding of the polypropylene composite material has the advantages of simple preparation process and low production cost.

Description

technical field [0001] The invention relates to a high-rigidity, high-heat-resistance polypropylene composite material and a preparation method thereof, and is a method for preparing a modified polypropylene composite material with simple process, low cost and good composite material performance. Background technique [0002] Polypropylene has the advantages of excellent processing performance, high toughness, good gasoline and chemical resistance, light weight and low price. It is the fastest growing general-purpose thermoplastic. However, polypropylene also has significant disadvantages of poor heat resistance and low rigidity. [0003] Usually, the rigidity, strength and heat resistance of polypropylene materials are greatly improved by adding glass fibers, but there are disadvantages of poor molding processability and poor surface quality of products. The method of adding talc to improve the rigidity of polypropylene is the most commonly used method. However, with the...

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Problems solved by technology

However, with the addition of a large amount of talcum powder (generally more than 30%), it is easy to cause uneven mixing, and the phenomenon of "bridging" in the talcum powder will cause difficulty in feeding, so that the amount of talcum powder added is insufficient or cannot be used in the aggregate. Efficient dispersion in propylene composites, resulting in reduced mechanical properties of polypropylene composites

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