Low-density and high-rigidity polypropylene composite material and preparation method of low-density and high-rigidity polypropylene composite material

Abstract

The invention discloses a low-density and high-rigidity polypropylene composite material and a preparation method of the low-density and high-rigidity polypropylene composite material and belongs to the field of high polymers. The composite material is prepared from the following components in parts by weight: 65 to 85 parts of polypropylene, 5 to 15 parts of glass micro-bead, 5 to 10 parts of a toughening agent, 5 to 10 parts of a rigid compound modifier and 0.1 to 2 parts of other auxiliary agents. In a preparation process, the glass micro-beads, the toughening agent and the rigid compound modifier are added and the glass micro-beads are intercalated and covered with the toughening agent preferably to form a core-shell structure, and are dispersed into a polypropylene phase; the rigid compound modifier is introduced so that the rigidity of the material is improved; the prepared polypropylene composite material has the characteristics of low density, high rigidity, low shrinkage, low luster and the like; the low density and the high rigidity are kept, and good toughness and flowability are represented; the density is smaller than 0.95g / cm<3> and a development trend of light weight is met.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to a low-density high-rigidity polypropylene composite material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the composition of modern automobile manufacturing materials has undergone major changes, the proportion of high-density materials has decreased, and the proportion of low-density materials has increased significantly. It can be said that since the 1990s, automobile materials have become increasingly popular. Lightweight, resource-saving, high-performance and high-function direction development. [0003] In the prior art, traditional mineral-filled polypropylene modified materials are widely used in interior and exterior decoration of automobiles. In recent years, the rapid development of the automobile industry and the continuous depletion of world energy have put forward higher and higher requi...

AI Technical Summary

Problems solved by technology

In recent years, the rapid development of the automobile industry and the continuous depletion of world energy have put forward higher and higher requirements for the lightweight of automobile materials. Traditionally, such as instrument panels, door panels, and pillars, PP+EPDM-T20 materials are used. The density At 1.04-1.07g / cm 3 , has become increasingly unable to meet the requirements for lightweight materials in the automotive industry

The traditional method of reducing the mineral filling ratio can reduce the density of the material, but the rigidity and strength cannot meet the actual design requirements of the part.

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