Ultralong unit extension glass fiber reinforced polypropylene composite material

Abstract

The invention relates to glass fiber reinforced polypropylene composite material with the super-long elongation. The glass fiber reinforced polypropylene composite material is characterized in that the composite material comprises the following components: 10 to 50 percent of homopolymerization polypropylene, 20 to 40 percent of copolymerization polypropylene, 10 to 40 percent of polyethylene, 0.5 to 5 percent grafted polypropylene, 10 to 40 percent of glass fibers, 0.1 to 2 percent of composite antioxidant, and 0.1 to 2 percent of other additives; and a preparation method for the composite material comprises the following steps: dryly mixing the homopolymerization polypropylene, the copolymerization polypropylene, the polyethylene, the grated polypropylene, the composite antioxidant and the other additives in a high speed mixer for 3 to 5 minutes according to the proportion; and then placing the mixed raw materials in a double screw extruder, and carrying out the melted extrusion andgranulation at 160 to 250 DEG C. The prepared composite material has not only the super-long elongation, but also other excellent physical mechanical properties. In addition, the composite material also has the reduced cost.

Description

technical field [0001] The invention relates to a method for making a glass fiber reinforced polypropylene composite material, in particular to the preparation of an ultra-long elongation glass fiber reinforced polypropylene composite material, belonging to the field of polymer composite materials. Background technique [0002] Polypropylene material has high rigidity, low relative density, high tensile strength, good stress crack resistance and chemical resistance, so it has been widely used in automobiles, home appliances, medical and other fields. Moreover, after the polypropylene material is reinforced by glass fibers, its physical and mechanical properties, such as strength, rigidity, material dimensional stability and heat resistance, are further improved, which is enough to compete with higher-cost engineering plastics in many application fields. However, one disadvantage of glass fiber reinforced polypropylene material is that its elongation at break is very small, g...

AI Technical Summary

Problems solved by technology

However, one disadvantage of glass fiber reinforced polypropylene material is that its elongation at break is very small, generally between 2% and 5%, which makes the material easy to be brittle during use and cannot be bent multiple times.

[0003] Unreinforced polypropylene or talc-filled polypropylene has good bending properties and high elongation at break, but its strength, rigidity and heat resistance are not as high as those of glass fiber reinforced polypropylene, so it is difficult to coordinate the performance of these two aspects , and the research and discussion on this aspect have not been reported in detail in the relevant literature.

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