High-toughness polypropylene/elastomer composite material and preparation method thereof

Abstract

The invention relates to a high-toughness polypropylene / elastomer composite material and a preparation method thereof. The composite material is composed of polypropylene, an elastomer, a beta nucleating agent and carbon nanotubes. The preparation method comprises the following steps: premixing the carbon nano tubes, the beta nucleating agent, the elastomer and the polypropylene, then performing melt blending granulation on the pre-mixture through an extruder, and preparing the high-toughness polypropylene / elastomer composite material product by an injection molding machine. According to the polypropylene composite material, the carbon nano tubes, the beta nucleating agent and the elastomer toughened polypropylene are added at the same time, and the polypropylene composite material shows excellent toughness due to the synergistic toughening effect of the carbon nano tubes, the beta nucleating agent and the elastomer toughened polypropylene. The method is simple in operation process, and the polypropylene composite material is prepared by using the industrial conventional double-screw extruder and the injection molding machine, so that production cost is low, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of polymer material modification and processing, and relates to a high-toughness polypropylene / elastomer composite material and a preparation method. Background technique [0002] As one of the five general-purpose plastics, polypropylene is widely used in industries such as automobiles, household appliances, electronics, building materials, household appliances, and chemical equipment due to its good chemical stability and mechanical properties, easy processing, and low cost. However, polypropylene has poor toughness and low notched impact strength, especially at low temperature or high strain rate, which greatly limits the deepening and expansion of polypropylene applications. [0003] At present, physical blending toughening modification is one of the effective methods to improve the toughness of polypropylene. There are three main types of tougheners introduced into polypropylene through physical blending modific...

AI Technical Summary

Problems solved by technology

For example: a reinforced, toughened polypropylene composite material and its preparation method (Chinese invention patent, publication number CN1390882A), the higher content of barium sulfate in this method will make the processing performance of polypropylene worse; another example: nanoparticles Polypropylene composite material reinforced and toughened with elastomer and its preparation method (Chinese invention patent, publication number CN103146060A), this method needs to modify the surface of nanoparticles, graft maleic anhydride on polypropylene, the raw materials are too limited and the method also more complicated

The second is the blending of elastomer, β-nucleating agent (calcium pimelate, dicyclohexyl terephthalamide, aryl dicarboxamide, etc.) with polypropylene, for example: a low-temperature tough isotactic polypropylene product Preparation method (Chinese invention patent, publication number CN103265758A), this invention only improves the low-temperature toughness of polypropylene, and the low-temperature toughness is only increased by more than two times, and the effect of low-temperature toughening is not significant; it does not involve the normal-temperature toughness of polypropylene

Images