Polypropylene composite material capable of realizing light weight and with low linear expansion coefficient and preparation method thereof

Abstract

The invention discloses a polypropylene composite material capable of realizing light weight and with low linear expansion coefficient and a preparation method thereof. The polypropylene composite material consists of the following raw materials in percentage by weight: 68-86% of polypropylene, 5-15% of whiskers, 6-10% of flexibilizer, 0.5-2% of efficient nucleating agent, 1-3% of compatilizer, 0.1-1% of antioxidant and 0.1-2% of other additives. In the invention, by adding the efficient nucleating agent and a few whiskers, the linear expansion coefficient of the polypropylene material can be effectively reduced while the material is endowed with the isotropy character in the case of relatively low density of the composite material. The polypropylene composite material disclosed by the invention has excellent rigid-rough balance and can be widely applied to the fields such as automobile interior and exterior trim to realize light weight.

Description

technical field [0001] The invention belongs to the field of polymer material modification and processing, and in particular relates to a lightweight polypropylene composite material with low linear expansion coefficient and a preparation method thereof. Background technique [0002] Polypropylene has become the fastest-growing general-purpose plastic variety in recent years because of its abundant raw material sources, low price, easy processing and excellent comprehensive performance, and is widely used in automotive interior and exterior trim parts, electronic and electrical products, and other fields. However, the linear expansion coefficient of ordinary polypropylene material is large, and the dimensional stability of its parts is poor. Especially in the environment of alternating cold and heat, the parts are prone to deformation and lead to problems such as abnormal matching, which greatly affect its application. Therefore, it is necessary to reduce the polypropylene c...

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Problems solved by technology

However, the above methods all need to add a large amount of mineral fillers, which will inevitably cause a sharp increase in the density of polypropylene materials, which is not conducive to the development of lightweight products in the automotive and other industries.

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