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Polyether ether ketone (PEEK) composite material modified from polyhedral oligomeric silsesquioxane (POSS)

A technology of polysilsesquioxane and composite materials, which is applied in the field of engineering plastic composite materials and polymer materials, and can solve problems such as low decomposition temperature, lower mechanical properties of PEEK composite materials, and difficulty in applying high-temperature processing conditions for PEEK composite materials. Achieve the effects of lower melt index, strong designability, and lower surface friction coefficient

Active Publication Date: 2015-02-04
余姚中国塑料城塑料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low decomposition temperature of traditional stearic acid, paraffin and mineral oil processing lubricants, it is difficult to apply to the high temperature processing conditions of PEEK composite materials (up to 400 ℃)
At present, there is a silicone-based processing modification additive on the market. Although it can meet the requirements of high-temperature processing conditions for PEEK composite materials, due to its chain structure, it usually reduces the mechanical properties of PEEK composite materials while improving fluidity. , which is also an inherent characteristic of usual lubricants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Combine VICTREX PEEK 450P with [(isobutyl-SiO 1.5 ) 7 (1-Aminopropyl-SiO 1.5 ) 1 ] ∑8 Mix evenly at 69:1, use ZSE-27 co-rotating parallel twin-screw extruder to process, introduce 3 bundles of glass fibers (988A, diameter 13μ, 2400Tex) into the side feed, and set the temperature in the 10th zone of the screw: 330, 340, 350, 370, 375, 380, 385, 385, 390, 380, the screw speed is 250 rpm, the glass fiber reinforced PEEK composite material with a glass fiber content of 30.1wt% is obtained, and the melt index is: 4.6g / 10min; Strength: 190.5MPa; tensile modulus: 11.9GPa; surface friction coefficient: 0.14.

Embodiment 2

[0020] Combine VICTREX PEEK 450P with [(isobutyl-SiO 1.5 ) 7 (1-Aminopropyl-SiO 1.5 ) 1 ] ∑8 Mix evenly at 13:1, introduce 3 bundles of glass fibers (910, diameter 13μ, 2400Tex) into the side feed, use ZSE-27 co-rotating parallel twin-screw extruder to process, the temperature of the 10th zone of the screw is set to: 330, 350, 350, 370, 370, 380, 380, 385, 385, 370, the screw speed is 250 rev / min, the glass fiber reinforced PEEK composite material with a glass fiber content of 30.5wt% is obtained, and the melt index is: 5g / 10min; tensile strength It is: 195MPa; the tensile modulus is: 12.0GPa; the surface friction coefficient is: 0.12.

Embodiment 3

[0022] Combine VICTREX PEEK 450P with [(isooctyl-SiO 1.5 ) 7 (1-Aminopropyl-SiO 1.5 ) 1 ] ∑8 Mix evenly at 9:1, introduce 3 bundles of glass fibers (988A, diameter 13μ, 2400Tex) into the side feed, and use CTE-35 co-rotating parallel twin-screw extruder to process. The temperature in the 6th zone of the screw is set to: 330, 350, 370, 380, 390, 380, the screw speed is 220 rpm, and the glass fiber reinforced PEEK composite material with a glass fiber content of 21.1wt% is obtained, the melt index is: 7g / 10min; the tensile strength is: 185MPa; the tensile modulus It is: 11.0GPa; the surface friction coefficient is: 0.10.

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Abstract

The invention belongs to the technical field of materials, and relates to high polymer material technology, in particular to an engineering plastic composite material, namely a polyether ether ketone (PEEK) composite material modified from polyhedral oligomeric silsesquioxane (POSS). According to the PEEK composite material modified from the POSS, high heat resistance and a nanometer characteristic of the POSS are utilized, the POSS is used as high-temperature resistant lubricant and dispersing agent, fibers are used as reinforcing materials to modify PEEK engineering plastics, screw rod extruding method is adopted for preparation, the processing process is improved, and the performance of the composite material is improved at the same time. The PEEK composite material modified from the POSS at least comprises 20-50 wt% of reinforced fibers, the mass ratio between the PEEK and the POSS is in a range of (3.5-69) / 1, the melt index of the PEEK composite material modified from the POSS is obviously lowered, the PEEK composite material modified from the POSS is good in process, low in energy consumption, high in production efficiency, strong in designability of a material system, suitable for processing of fiber content composite products, and particularly suitable for processing special-shaped thin-wall products, and meanwhile the skin-friction coefficient of the products can be lowered.

Description

technical field [0001] The invention belongs to the field of material technology, and relates to polymer material technology, in particular to engineering plastic composite materials. Background technique [0002] PEEK special engineering plastic has special high temperature resistance, high strength, high wear resistance, high dimensional stability and good corrosion resistance. It has performance advantages that general plastics and ordinary engineering plastics cannot achieve. At present, with technological progress and production costs It has been widely used in aviation, aerospace, national defense and civil industries. PEEK has a high melt viscosity and poor processing fluidity. Organic or inorganic high-strength fiber-reinforced PEEK composites have higher melt viscosity and poorer processing performance. In some processing occasions that require good fluidity, such as large-scale injection molding In thin-walled products, extruded products, and thermoplastic composi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/08C08L77/10C08K5/549C08K7/14C08K7/06C08K3/04
Inventor 王建国李文春李树军梁勇芳邵军刘光晨赵红玉
Owner 余姚中国塑料城塑料研究院有限公司
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