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Wear-resistant self-lubricating thermoplastic polyimide composite material and preparation method thereof

A polyimide and composite material technology, applied in the field of polymer composite materials, can solve the problems of poor thermoplastic processing performance, difficult processing of thermoplastic processing equipment, etc., to improve melt viscosity, improve thermoplastic processability, and expand application fields Effect

Inactive Publication Date: 2019-05-03
中广核高新核材科技(苏州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, domestically produced thermoplastic polyimide products generally have the problem of poor thermoplastic processing performance. After the resin is added with additives such as self-lubricating agents, it is very difficult to process with thermoplastic processing equipment.

Method used

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  • Wear-resistant self-lubricating thermoplastic polyimide composite material and preparation method thereof
  • Wear-resistant self-lubricating thermoplastic polyimide composite material and preparation method thereof
  • Wear-resistant self-lubricating thermoplastic polyimide composite material and preparation method thereof

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preparation example Construction

[0041] On the basis of the above, the present application further provides a method for preparing a wear-resistant self-lubricating thermoplastic polyimide composite material, comprising the following steps:

[0042]S1. Weigh polyimide, ether bond-containing polar resin, non-polar crystalline resin, self-lubricating agent, wear-resistant agent, processing aid and antioxidant according to the aforementioned parts by weight and mix to obtain a mixture,

[0043] S2. Add the mixture into the main feed of the twin-screw extruder, add the reinforcing fiber into the side feed of the twin-screw extruder, and draw it out from the outlet of the die after melt extrusion. Pelletizing after water cooling to obtain wear-resistant self-lubricating thermoplastic polyimide composite particles, wherein the melt extrusion temperature of the twin-screw extruder is 300-380° C., and the screw speed is 250-350 rpm / min.

Embodiment 1

[0046] S1. Weigh 50 parts of polyimide (Ningbo Institute of Chinese Academy of Sciences), 5 parts of polyethersulfone, 30 parts of polypropylene, 5 parts of polytetrafluoroethylene powder, 5 parts of graphite, 0.2 part of PETS, 0.8 part of anti- 1010, mix uniformly to obtain a mixture.

[0047] S2. Add the mixture to the main feed of the twin-screw extruder, add 5 parts of glass fiber to the side feed of the twin-screw extruder, melt and extrude it from the outlet of the die head, and pelletize it after water cooling to obtain High wear-resistant self-lubricating thermoplastic polyimide composite particles.

[0048] Wherein, the melt extrusion temperature of the twin-screw extruder is 300-350° C., and the screw speed is 250 rpm / min.

[0049] Put the granular material into the barrel of the injection molding machine. The temperature of the barrel is about 350-380°C. After heating, melting, and plasticizing, it is injected into the mold under the strong push of the screw or plu...

Embodiment 2

[0051] S1. Weigh 50 parts of polyimide (Changchun Gaoqi), 15 parts of polyphenylene ether, 15 parts of polyether ketone ketone, 5 parts of LLDPE (linear low density polyethylene), 5 parts of polyperfluoroethylene according to parts by weight. After propylene powder, 5 parts of molybdenum disulfide, 0.2 part of erucamide, 0.2 part of anti-1076, and 0.6 part of anti-168, mix them evenly to obtain a mixture.

[0052] S2. Add the mixture to the main feed of the twin-screw extruder, add 5 parts of composite crystal fiber to the side feed of the twin-screw extruder, melt and extrude it from the outlet of the die head, and cut into pellets after water cooling High wear-resistant self-lubricating thermoplastic polyimide composite material particles are obtained.

[0053] Wherein, the melt extrusion temperature of the twin-screw extruder is 300-350° C., and the screw speed is 250 rpm / min.

[0054] Put the granular material into the barrel of the injection molding machine. The temperat...

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Abstract

The invention discloses a wear-resistant self-lubricating thermoplastic polyimide composite material which comprises the following components in parts by mass: 50-70 parts of polyimide, 5-30 parts ofether- bond -containing polar resin, 5-30 parts of non-polar crystalline resin, 5-30 parts of a self-lubricating agent, 5-30 parts of a wear-resistant agent, 0.2-1 part of a processing aid and 0.1-1 part of an antioxidant. According to the invention, by virtue of the synergistic modification effect of the two kinds of high-molecular resin of the ether- bond -containing polar resin and the non-polar crystalline resin, the thermoplastic processing property of the polyimide composite material can be obviously improved, and the excellent comprehensive performance of polyimide can be maintained.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a wear-resistant self-lubricating thermoplastic polyimide composite material and a preparation method thereof. Background technique [0002] With the rapid development of industries such as aerospace, nuclear power, automobiles, ships, and machinery manufacturing, more and more high-load friction sliding parts are used in dry friction, hydraulic and water environments. Self-lubricating material technology has become the development trend of current lubrication technology due to its unique advantages, and the development of high-strength and high-wear-resistant self-lubricating materials has also become a research hotspot in the field of tribology. [0003] Polyimide is resistant to high temperature, solvent, radiation, and combustion. It has excellent mechanical properties and anti-friction and anti-wear properties. widely used. Its products are mainly films and molde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L81/06C08L23/12C08L71/12C08L61/16C08L23/08C08L27/18C08L71/10C08L23/06C08K13/02C08K3/30C08K3/04C08K13/04C08K7/06C08K7/14
Inventor 何晓东
Owner 中广核高新核材科技(苏州)有限公司
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