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Floating fiber phenomenon improved carbon fiber reinforced polypropylene composition and preparation method thereof

A polypropylene composition and polypropylene technology are applied in the field of polymer composite materials, which can solve the problems of affecting the appearance of PA parts, affecting the performance of compression-resistant parts, and increasing the difference in color and luster, so as to increase the interface compatibility. , The effect of improving the bonding state and excellent mechanical properties

Inactive Publication Date: 2018-01-05
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after adding carbon fiber, it is easy to appear the phenomenon of floating fiber. The phenomenon of floating fiber is generally caused by the exposure of carbon fiber. The white carbon fiber is exposed on the surface during the filling and flow process of the plastic melt. After condensation molding, it will form a radial white on the surface of the plastic part. Traces, when the plastic part is black, it will be more obvious due to the increased color difference
Therefore, the floating fiber phenomenon not only affects the appearance of PA parts, but also affects its performance as a pressure-resistant part.

Method used

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  • Floating fiber phenomenon improved carbon fiber reinforced polypropylene composition and preparation method thereof
  • Floating fiber phenomenon improved carbon fiber reinforced polypropylene composition and preparation method thereof
  • Floating fiber phenomenon improved carbon fiber reinforced polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Dry polypropylene at a temperature of 50°C for 4 hours; polyethylene at a temperature of 50°C for 4 hours;

[0034] (2) Take by weighing dry 60 parts of polypropylene, 1 part of polyethylene, 25 parts of carbon fiber, 5 parts of mica, 10 parts of sodium benzoate, and 5 parts of silicone oil;

[0035] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 3 minutes;

[0036] (4) Then, the above-mentioned uniformly mixed material is added to the feeding port of the twin-screw extruder, melted and extruded by the twin-screw extruder, and granulated to obtain a polypropylene composition;

[0037] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 160°C, the temperature of the second zone is 170°C, the temperature of the third zone is 185°C, the temperature of the fourth zone is 185°C, the temperature of the fifth zone is 200°C, and the temperature of the sixth zone T...

Embodiment 2

[0039] (1) Dry polypropylene at a temperature of 80°C for 5 hours; polyethylene at a temperature of 80°C for 5 hours;

[0040] (2) take by weighing dry 40 parts of polypropylene, 10 parts of polyethylene, 30 parts of carbon fiber, 5 parts of mica, 5 parts of toughening agent (maleic anhydride grafted ethylene-octene copolymer), 8 parts Parts of sodium benzoate, 8 parts of silicone oil;

[0041] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 minutes;

[0042] (4) Then, the above-mentioned uniformly mixed material is added to the feeding port of the twin-screw extruder, melted and extruded by the twin-screw extruder, and granulated to obtain a polypropylene composition;

[0043] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 170°C, the temperature of the second zone is 180°C, the temperature of the third zone is 195°C, the temperature of the fourth zone is 200°C...

Embodiment 3

[0045] (1) Dry polypropylene at a temperature of 60°C for 4 hours; polyethylene at a temperature of 70°C for 5 hours;

[0046] (2) Weigh dry 40 parts of polypropylene, 5 parts of polyethylene, 35 parts of carbon fiber, 10 parts of mica, 3 parts of toughening agent (ethylene-methyl acrylate copolymer and ethylene-methyl acrylate- glycidyl methacrylate), 5 parts of sodium benzoate, 10 parts of silicone oil;

[0047] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 4 minutes;

[0048] (4) Then, the above-mentioned uniformly mixed material is added to the feeding port of the twin-screw extruder, melted and extruded by the twin-screw extruder, and granulated to obtain a polypropylene composition;

[0049] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 180°C, the temperature of the second zone is 190°C, the temperature of the third zone is 200°C, the temperature of the ...

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Abstract

The invention provides a floating fiber phenomenon improved carbon fiber reinforced polypropylene composition and a preparation method thereof. The composition is prepared by mixing and extrusion granulation of 30-60 parts of polypropylene, 1-10 parts of polyethylene, 25-45 parts of carbon fiber, 5-15 parts of mica, 0-5 parts of a toughening agent, 5-10 parts of a nucleating agent, and 5-10 partsof silicone oil. The mica and silicone oil added in the invention strengthen the compatibility of polypropylene and carbon fiber, and crosslinking points are formed between the carbon fiber and polypropylene resin, thus improving the bonding state of carbon fiber and resin, and reducing the separation of carbon fiber and resin. At the same time, the mutual cooperation of mica and silicone oil improves the carbon fiber dispersibility, increases the interfacial bonding strength of polypropylene and carbon fiber, and reduces the separation of carbon fiber and resin, thereby greatly reducing carbon fiber exposure, and improving the compressive properties of the polypropylene composition.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a carbon fiber reinforced polypropylene composition with improved floating fiber phenomenon and a preparation method thereof. Background technique [0002] Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a molecular weight of about 80,000-150,000 and a density of only 0.90-0.91g / cm 3 , is currently one of the lightest varieties of all plastics. In addition, polypropylene is particularly stable to water, with a water absorption rate of only 0.01% in water. Although polypropylene has good formability, due to its large shrinkage rate of about 1% to 2.5%, thick-walled products are prone to dents, so it is difficult to meet the requirements for some parts with high dimensional accuracy. [0003] At present, polypropylene is mainly reinforced by adding glass fibers, which can improve the strength, heat distortion tem...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L51/06C08L23/08C08L83/04C08K7/06C08K3/34C08K5/098B29C47/92B29C48/92
Inventor 杨桂生吴安琪范继贤
Owner HEFEI GENIUS NEW MATERIALS