Polyphenylene sulfide nano whisker composite material and preparation method thereof

A technology of polyphenylene sulfide and nano-whiskers, which is applied in the field of polymer composite materials, can solve problems such as poor fluidity, increased density of composite materials, and limited addition amount, so as to reduce costs, improve fluidity, and increase addition amount Effect

Inactive Publication Date: 2010-07-14
四川华通特种工程塑料研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fiber and filler increase the density of the composite material, the fluidity is poor, and the surface roughness increases
In order to use PPS in a wider range, previous experiments have used calcium sulfate whiskers alone to adjust the surface finish and mechanical properties of the composite material. However, due to the unique structure of the whiskers, the amount of whiskers added, the mechanical properties of the composite material limited in terms of strength
On the basis of the whisker-reinforced polyphenylene sulfide composite material, the nano-inorganic filler treated by conventional methods (silane coupling agent or titanate coupling agent) is easily caused by the agglomeration phenomenon due to the surface area effect, so that in the composite material The addition of inorganic fillers is limited, so the cost, fluidity, toughness and mechanical strength of composite materials are limited, which restricts the further improvement of materials

Method used

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  • Polyphenylene sulfide nano whisker composite material and preparation method thereof
  • Polyphenylene sulfide nano whisker composite material and preparation method thereof
  • Polyphenylene sulfide nano whisker composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Use as figure 1 Process. 37% of the PPS resin with a molecular weight of 40,000 is put into a double cone drying cyclotron to vacuum (under oxygen-free conditions), the vacuum degree is 0.07Pa, and the temperature is increased to 220°C for 2 hours to crosslink to obtain a crosslinked PPS resin; 5% nano carbonic acid Calcium and 2% rare earth coupling agent (DN-930, Nanjing Daoning Chemical Co., Ltd.) are fully mixed in a high-speed (1000 rpm) mixer to obtain nano inorganic fillers treated with rare earth coupling agent; 15% calcium sulfate whiskers Mix well with 0.5% silane coupling agent (KH-550) in a high-speed (600 revolutions / min) mixer to obtain calcium sulfate whiskers treated with silane coupling agent; 0.5% antioxidant (1010). After the mixing treatment, the mixed materials are put into the hopper of the twin-screw extruder, melt blended, extruded and granulated to become composite material particles. Among them, the extrusion granulation processing conditions: ...

Embodiment 2

[0013] Polyphenylene sulfide crosslinking method, calcium sulfate whisker treatment method, and nano calcium carbonate treatment method are the same as in Example 1. 35% polyphenylene sulfide, 15% calcium sulfate whisker, 40% glass fiber, 8.2% nano calcium carbonate, 0.8% rare earth coupling agent, 0.5% silane coupling agent, 0.5% antioxidant. Use the above as figure 1 In the process, the mixed materials are added to the hopper of the twin-screw extruder, melted and blended, extruded and granulated into composite materials. The processing technology is the same as in Example 1, and the melt pressure is 17 MPa.

Embodiment 3

[0015] Polyphenylene sulfide crosslinking method, calcium sulfate whisker treatment method, and nano calcium carbonate treatment method are the same as in Example 1. 39% polyphenylene sulfide, 15% calcium sulfate whisker, 40% glass fiber, 2.5% nano calcium carbonate, 2.5% rare earth coupling agent, 0.5% silane coupling agent, 0.5% antioxidant. Use the above as figure 1 In the process, the mixed materials are added to the hopper of the twin-screw extruder, melted and blended, extruded and granulated into composite materials. The processing technology is the same as in Example 1, and the melt pressure is 15 MPa.

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Abstract

The invention discloses a polyphenylene sulfide nano whisker composite material and a preparation method thereof. The composite material comprises the following raw material components in percentage by mass: 24 to 39 percent of polyphenylene sulfide(PPS), 15 percent of calcium sulfate whisker, 40 percent of glass fiber(GF), 2.5 to 17.5 percent of nano inorganic filler, 0.8 to 2.5 percent of rare-earth coupling agent (DN-930), 0.5 percent of silane coupling agent (KH-550) and 0.5 percent of antioxidant (1010). The preparation method comprises the following steps: crosslinking PPS resin; preparing the nano inorganic filler treated by the rare-earth coupling agent and the calcium sulfate whisker treated by the silane coupling agent; mixing the materials; and extruding the mixture to form grains of the polyphenylene sulfide nano whisker composite material. The obtained polyphenylene sulfide nano whisker composite material has the advantages of high mechanical strength, good material flow rate and low unit production cost.

Description

Invention field [0001] The invention belongs to the field of polymer composite materials, especially polyphenylene sulfide resin composite materials. technical background [0002] Polyphenylene sulfide (PPS) is a linear polymer formed by connecting sulfur atoms in the para position of the benzene ring. It is a semi-crystalline high-performance resin with excellent mechanical properties, electrical properties, high temperature resistance and chemical corrosion resistance. Important characteristics such as sex. However, because a large number of benzene rings on the PPS main chain increase the rigidity of the polymer chain, its toughness deteriorates, so it is limited in its application. Therefore, glass fiber (GF), carbon fiber (CF), fillers or other resins are blended to enhance toughness. Improve impact performance, heat resistance and mechanical strength to a certain extent. However, fibers and fillers increase the density, poor fluidity, and surface roughness of composite m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L81/02C08K9/04C08K9/06C08K7/08C08K7/14C08K3/26C08K3/36C08K3/34
Inventor 戴厚益闵敏高勇余大海张勇
Owner 四川华通特种工程塑料研究中心有限公司
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