Preparation method of fiber reinforced polypropylene matrix composite material

Abstract

The invention discloses a fiber reinforced polypropylene composite material. The sample parameters are as the following: 10-20 parts of fiber with a fiber content of 40-60Wt%, 80-90 parts of polypropylene resin, 0.01-5 parts of a heat stabilizer and 1% maleic anhydride. The preparation method includes: treating the fiber with a length of 3-10mm with 1% maleic anhydride, then performing drying at 105DEG C for 1h, mixing the dried fiber with polypropylene and the heat stabilizer in a Haake torque rheometer evenly, conducting cooling granulation, performing drying at 70DEG C for 3h, and then carrying out injection into a sample. The materials adopted by the invention are easily available, the tensile strength and flexural strength of polypropylene are effectively improved, compared with purepolypropylene, the 1% maleic anhydride treated 60Wt% fiber reinforced polypropylene has tensile strength improved by 100% and flexural strength improved by 120%. Comparison of the residual flexural modulus and loss flexural modulus before and after treatment with maleic anhydride concludes that the bonding force between the treated fiber and the matrix is increased, and the properties of polypropylene are enhanced, and then application of polypropylene in automobiles, electronics, home decoration and other fields is expanded.

Description

Technical field: [0001] The invention belongs to the field of polymer composite materials in material science, and relates to a method for preparing high-toughness polypropylene-based composite materials by using fibers. The polypropylene-based composite material prepared according to the invention solves the problems of low elongation at break, low toughness and bonding force between fibers and matrix of traditional polypropylene. The method involved in the invention is simple to operate, the performance of the prepared material is highly controllable, and is suitable for industrial production in laboratories and enterprises. The material is a high-toughness polypropylene-based composite material. Background technique: [0002] At present, the reinforcing fibers in fiber-reinforced composite materials are mainly glass fibers, aramid fibers, and carbon fibers. These reinforcing fiber materials have good and uniform performance, but they generally have processing difficulties...

AI Technical Summary

Problems solved by technology

In addition, when the world economic crisis or trade barriers are encountered, the demand for hemp will be greatly reduced, which will have a great impact on the production and operation of the factory. Therefore, it is very urgent to expand the scope of fiber use.