| abstract |
The invention discloses a polypropylene composite material with good impact-resistance and low-temperature toughness and a preparation method thereof. The composite material is prepared from the following components by weight percent: 30-80% of polypropylene resin, 10-40% of low-density low-melt index polyolefin elastomer, 1-30% of filled reinforcing agents, 1-10% of interface modifying agent and 0.1-4% of other additives. Due to the adoption of the polypropylene composite material prepared by the method provided by the invention, all performance indexes all achieve or exceed the preset requirements, particularly, low-temperature performance is excellent, and the breakage form of multi-axis low-temperature impact (the impact speed is 6.6m/s according to the ASTM D3763 test) belongs to the toughness breakage. According to the good impact-resistance and low-temperature toughness polypropylene composite material, the processing performance and the size stability are good, and the requirements of the appearance, the performance and the processing property of materials caused by automotive upholsteries such as an instrument panel and stand columns can be met. |