High-toughness high-rigidity modified polypropylene material and preparation method thereof

Abstract

The invention discloses a high-toughness high-rigidity modified polypropylene material and a preparation method thereof. The high-toughness high-rigidity modified polypropylene material mainly comprises the following components in percentage by weight: 47.0%-99.8% of polypropylene, 0%-20% of talcum powder, 0.2%-1% of antioxidants, 0%-30% of elastomers, 0.1%-1.5% of cross-linking agents and 0.1%-0.5% of auxiliary cross-linking agents. By being different from a general principle of toughening polypropylene by adding the elastomers, the modified polypropylene material disclosed by the invention realizes the dynamic vulcanization in the melt blending process of the elastomers and the polypropylene by using the cross-linking agents and the auxiliary cross-linking agents on the basis that the elastomers are added to a formula which takes the polypropylene as a substrate, so the high-toughness high-rigidity modified polypropylene material is different from the characteristic that TPV appears as rubber at normal temperature. The modified polypropylene material disclosed by the invention appears as the physical property of a thermoplastic plastic at normal temperature, not only has the rigidity of a thermoplastic material, but also has high toughness, so that the high-toughness high-rigidity modified polypropylene material is obtained.

Description

Technical field [0001] The invention relates to a modified polypropylene material with high toughness and high rigidity, in particular to a modified polypropylene material with high toughness and high rigidity and a preparation method thereof. Background technique [0002] In recent years, the automotive industry has developed rapidly. As the main force of automotive interior materials, the demand for polypropylene composite materials has increased sharply. For door panels, instrument panels, trim pillars and other automotive interior parts that require high safety factors, in addition to the requirements of the parts need to have sufficient strength, it can not only carry other parts installed on the instrument panel or door panel, but also It has sufficient ability to resist deformation caused by external stress. At the same time, the parts are required to have sufficient toughness to resist the impact of external force, so that there will be no obvious cracks or sharp fragment...

AI Technical Summary

Problems solved by technology

[0003] Generally speaking, for copolymerized polypropylene materials, polypropylene materials toughened and modified by elastomers can already have relatively good impact performance at room temperature, but due to the high glass transition temperature of polypropylene materials, resulting in -30 °C or even -40 °C environment shows very poor toughness, which can be improved by toughening and modifying elastomers, but blindly increasing the amount of elastomers to improve toughness results in a sharp drop in material rigidity and thermal deformation resistance. Therefore, the strength requirements of larger parts cannot be met

Images