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Polymer composite for bearing and preparation method thereof

A composite material and polymer technology, applied in the field of polymer composite materials for bearings and their preparation, can solve the problems of low elastic modulus, poor bearing capacity, difficult processing, etc., to reduce friction coefficient, improve service life, increase resistance The effect of thermal properties

Active Publication Date: 2013-10-16
CHANGCHUN A&Z SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of polymer composite material for bearings, to solve the above-mentioned problems existing in the prior art, the polymer composite material prepared by the present invention greatly reduces the friction coefficient of the material and improves the wear resistance of the material Performance, mechanical properties and service life, overcome the disadvantages of low elastic modulus, poor bearing capacity and difficult processing of polymer composite materials for bearings in the prior art

Method used

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  • Polymer composite for bearing and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] Synthesis of prepolymers

[0035] In the reactor, add 2000g of polytetrahydrofuran diol (number average molecular weight: 2000), dehydrate in vacuum at 130°C for 2 hours, then cool down the system to 80°C in the presence of nitrogen, add 550g of p-phenylene diisocyanate powder, stir and react for 2 hours That is to obtain the prepolymer P, the weight percent of diisocyanate in the prepolymer P is 8%.

[0036] In the reactor equipped with 100g prepolymer P, 4g of dry molybdenum disulfide, 5g of colloidal graphite, 0.2g of polytetrafluoroethylene powder, 0.2g of carbon fiber, 0.5g of nano-calcium carbonate were added under stirring conditions at 80°C, Nano-zinc oxide 2g, ultra-high molecular weight polyethylene powder 6g, carbon nanotube 0.5g, nano-titanium dioxide 0.6g, carbodiimide 5g, chopped glass fiber 0.2g, fully stirred for 50min, and vacuumized for 20min to obtain the mixed system Q1 .

[0037] Under strong stirring, quickly add 7.8g of chain extender 1,4-butane...

Embodiment 2

[0041] In the reactor equipped with 100g of the prepolymer P synthesized in Example 1, 10g of dry molybdenum disulfide, 1g of colloidal graphite, 0.8g of polytetrafluoroethylene powder, and 0.9g of carbon fiber were added under stirring conditions at 80°C. Nano-calcium carbonate 0.1g, nano-zinc oxide 6g, ultra-high molecular weight polyethylene powder 2g, carbon nanotubes 1.5g, nano-titanium dioxide 0.2g, carbodiimide 15g, chopped glass fiber 0.8g, fully stirred for 50min, vacuumed for 20min Finally, the mixed system Q2 is obtained.

[0042]Under strong stirring, quickly add 7.8g of chain extender 1,4-butanediol to the mixing system Q2, inject it into a mold at 110°C within 1 minute, pressurize and vulcanize at 110°C and 15Mpa for 20min, demould, and oven at 110°C After curing for 16 hours, a composite product for water-lubricated bearings was obtained. After testing: the tensile strength of the material is 36Mpa, the elongation at break is 400% (GB / T 1701-2001); the hardness...

Embodiment 3

[0044] In the reactor equipped with 100g of the prepolymer P synthesized in Example 1, 15g of dry molybdenum disulfide, 2g of colloidal graphite, 0.8g of polytetrafluoroethylene powder, and 0.9g of carbon fiber were added respectively under stirring conditions at 80°C. Nano-calcium carbonate 0.1g, nano-zinc oxide 6g, ultra-high molecular weight polyethylene powder 4g, carbon nanotube 1.0g, nano-titanium dioxide 0.2g, carbodiimide 12g, chopped glass fiber 0.8g, fully stirred for 50min, vacuumed for 20min Finally, the mixed system Q3 is obtained.

[0045] Under strong stirring, quickly add 7.8g of chain extender 1,4-butanediol to the mixing system Q3, inject it into a mold at 110°C within 1 minute, pressurize and vulcanize at 110°C and 15Mpa for 20min, demould, and oven at 110°C After curing for 16 hours, a composite product for water-lubricated bearings was obtained. After testing: the tensile strength of the material is 32Mpa, the elongation at break is 450% (GB / T 1701-2001);...

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Abstract

The invention discloses a polymer composite for a bearing and a preparation method thereof and belongs to the field of polymer composites. The preparation method includes preparing a prepolymer by means of polymers of dihydric alcohol and diisocyanate, adding nanometer calcium carbonate, nanometer titanium dioxide, molybdenum disulfide, colloidal graphite, carbon fiber, polytetrafluoroethylene powders, nanometer zinc oxide and ultra high molecular weight polymethylene powders in to the prepolymer, adding chain extender after full mixing for a chain extending reaction, pouring, mold pressing vulcanization, and obtaining the polymer composite for the bearing. According to the polymer composite for the bearing and the preparation method thereof, the defects that polymer composites for bearings have low elasticity modulus and poor bearing capability, and are difficult to process in prior art are overcome, and the polymer composite for the bearing is small in friction coefficient, good in wear resistance, good in mechanical properties and long in service life.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, more specifically, the invention relates to a polymer composite material for bearings and a preparation method thereof. Background technique [0002] Bearings are widely used supporting parts in machines, among which sliding bearings are the most widely used. Sliding bearings include marine stern bearings, rudder bearings, water pump bearings, turbine bearings, etc. In practical applications, there are strict requirements on the bearing material's pressure bearing, wear resistance, corrosion resistance, friction resistance and other properties. At present, the sliding bearings used in China are mainly the Seron bearings from Canada, and there are also some bearings mainly made of rubber materials. Imported Seron bearings are expensive; rubber-based materials have low elastic modulus and poor load-carrying capacity. In order to bear the weight of the ship stern sha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/08C08L75/06C08L27/18C08L23/06C08K13/04C08K7/06C08K7/14C08K7/00C08K3/04C08K3/30C08K3/26C08K3/22C08K5/29C08G18/66C08G18/32C08G18/10
Inventor 王世伟郇彦杨小牛
Owner CHANGCHUN A&Z SCI CO LTD
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