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High performance short glass fiber enhanced polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, which is applied in the field of high-performance short glass fiber reinforced polypropylene composite material and its preparation, can solve the problems of product quality fluctuation, glass fiber fracture damage, long screw stroke, etc., to ensure the retention length and improve the Effects of impact strength and fluidity increase

Active Publication Date: 2016-03-09
CGN JUNER NEW MATERIALS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The first method has advantages in terms of material cost, but the large shear force of the screw makes it difficult to control the length and length distribution of glass fibers in the product, resulting in fluctuations in product quality
The second method is simple and convenient to operate. Compared with the third method, the material passes through a longer screw stroke and receives more shearing action, which causes serious fracture damage to the glass fiber, so the mechanical properties of the product are better than the third method. way lower

Method used

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  • High performance short glass fiber enhanced polypropylene composite material and preparation method thereof
  • High performance short glass fiber enhanced polypropylene composite material and preparation method thereof
  • High performance short glass fiber enhanced polypropylene composite material and preparation method thereof

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Embodiment 1～5

[0060] The preparation of modified polypropylene includes: dissolving dicumyl peroxide (DCP) and silane coupling agent KH-550 with acetone. A small amount of acetone is used to dissolve dicumyl peroxide (DCP) and silane coupling. Coupling agent is sufficient, and it is evenly mixed with polypropylene. The mass ratio of dicumyl peroxide, silane coupling agent KH-550 and polypropylene is 1:3:100, and then extruded by twin screw extruder after drying. , Pelletizing to obtain modified polypropylene;

[0061] The preparation of the modified chopped glass fiber includes: putting the chopped glass fiber into the aqueous solution of the silane coupling agent KH-550 (the mass percentage of the silane coupling agent is 30%), then take it out, and bake it at 80℃ for 1h. , Remove part of the water, and then increase the temperature to 140°C for 45 minutes to obtain the coupling agent grafted polypropylene, which makes the coupling agent and the glass fiber form a firm bond. Finally, the coup...

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Abstract

The invention discloses a high performance short glass fiber enhanced polypropylene composite material, which is composed of the following components in percentage by weight: 50 to 85% of polypropylene, 2 to 8% of modified polypropylene, 10 to 40% of modified short-cut glass fiber, 0.1 to 5% of antioxidant, and 0.5 to 5% of lubricant, wherein the modified polypropylene is prepared by modifying polypropylene with dicumyl peroxide and a silane coupling agent, and the modified short-cut glass fiber is prepared by modifying short-cut glass fiber with dicumyl peroxide and a silane coupling agent. Through the formula mentioned above, the provided composite material has the advantages of high modulus, high strength, and high impact strength. The invention also discloses a preparation method of the high performance short glass fiber enhanced polypropylene composite material. According to the preparation method, a same direction double-screw extruder is adopted, a specific screw combination is used to ensure that the length of glass fiber is short and the length distribution is in a narrow range, and thus a high performance polypropylene material is obtained.

Description

Technical field [0001] The invention relates to the field of polypropylene composite materials, in particular to a high-performance short glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, high-performance, low-cost thermoplastic resin-based composite materials have been widely used. It is an effective shortcut for the development of new materials to prepare fiber-reinforced thermoplastic resin matrix composites by adding reinforcing fibers to the thermoplastic resin and modifying the resin at the same time. This has become the consensus of the industry, and it is also the realization of general plastic engineering. The best technical route for the functionalization of engineering plastics and the practical application of special engineering plastics. [0003] Short glass fiber reinforced polypropylene composites are easy to process, low cost, and excellent in m...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/26C08K9/06C08K7/14C03C25/50
CPCC03C25/40C03C25/50C08L23/12C08L2205/02C08L23/26C08K9/06C08K7/14
Inventor 陈光剑黄志杰郑京连宋玉兴陈永波
Owner CGN JUNER NEW MATERIALS
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