Polypropylene-nanometer attapulgite composite material and preparation method thereof

Abstract

The invention discloses a polypropylene-nanometer attapulgite composite material and a preparation method thereof. The material includes the following components: 58-90 parts of polypropylene, 4-10 parts of nanometer attapulgite, 1-8 parts of a compatibilizer, and 0.1-2 parts of a lubricant. The preparation method includes the following steps: a) putting 20 wt%-30 wt% of the polypropylene of the formula, all the nanometer attapulgite, all the compatilizer, all the lubricant and 35 wt%-45 wt% of an antioxidant of the formula into an internal mixer for mixing, and carrying out extrusion granulation by using a single screw extruder with a length-diameter ratio of 20:1 to obtain nanometer attapulgite master batches; and b) melting, mixing and dispersing the residual 70 wt%-80 wt% of the polypropylene, the nanometer attapulgite master batches obtained in the step a), a toughening agent and the residual 55 wt%-65 wt% of the antioxidant in a double screw extruder with a length-diameter ratioof 40:1, and carrying out extrusion granulation to obtain the polypropylene-nanometer attapulgite composite material. According to the invention, the scratch resistance of the polypropylene-nanometerattapulgite composite material prepared by adding a specific amount of the nanometer attapulgite into a polypropylene matrix under the synergistic dispersion of a specific amount of the lubricant andcompatibilizer can be obviously improved.

Description

technical field [0001] The invention relates to the field of polymer materials and their molding processing, in particular to a polypropylene-nanometer attapulgite composite material and a preparation method thereof. Background technique [0002] With the gradual marketization of the concept of energy saving, environmental protection and consumption reduction, the trend of lightweight automobile body in the automobile industry has gradually become the core task of automobile design. Polypropylene, as the material of choice for automotive interior parts, has been maturely used in the industry. For example, according to the application requirements and characteristics of different parts, it has been modified to meet the needs such as reinforcement, toughening and functionalization. [0003] Various types of copolymerized and homopolymerized polypropylene developed by petrochemical plants often have advantages in several aspects, such as melt flow rate, impact strength, low tem...

AI Technical Summary

Problems solved by technology

The three methods are often applied to adjust the comprehensive performance at the same time, but it is not easy to achieve a balance of performance in all aspects simultaneously.

However, the attapulgite surface treatment method requires aqueous solution and ultrasonic oscillation, which is cumbersome, consumes a lot of energy, and has low efficiency, so it is not suitable for mass production.

Chinese patent CN 201610767768.0 discloses a method of adding low-content nano-montmorillonite to achieve excellent mechanical properties and low friction coefficient, but the treatment method of montmorillonite involves acrylamide intercalation, and the process inevitably increases multiple processes. Bring large production investment to large-scale mass production

However, complex and cumbersome processing techniques and conditions increase production costs and limit its commercial application in the booming automotive industry

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