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Monomer casting nylon composite

A technology of composite materials and cast nylon, which is applied in the field of polymer composite materials, can solve the problems of poor impact resistance and friction performance, achieve improved impact resistance and wear resistance, wide application range, mechanical properties and friction properties Improved effect

Inactive Publication Date: 2012-02-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese invention patent CN 101928457 A discloses a cast nylon composite material with about 0.1-5% graphene added, the resulting cast nylon composite material is the same as that without Graphene cast nylon material has improved mechanical properties by 5-20%, but its impact resistance and friction properties are poor

Method used

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Examples

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specific Embodiment

[0016] A kind of specific embodiment of cast nylon composite material of the present invention is as follows:

[0017] Adopting the technical scheme that the weight ratio of caprolactam to graphene is 100:0.005, the caprolactam is mixed with graphene, and catalyzed and polymerized to make cast nylon composite materials. The specific preparation method is as follows:

[0018] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring, melt the caprolactam at a temperature of 100°C, add 0.005 parts of graphene, and add 0.005 parts of graphene at an ultrasonic power of 180w, a frequency of 100Hz, a mechanical stirring rate of 500rpm, and a temperature of at 100° C., and dispersed for 30 minutes to obtain a graphene caprolactam dispersion. At a temperature of 130°C and a vacuum of 0.07 MPa, dehydrate for 20 minutes. Then add 0.15 parts of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree ...

Embodiment 2

[0020] A kind of specific embodiment of cast nylon composite material of the present invention is as follows:

[0021] Using the technical scheme of caprolactam and graphene weight ratio of 100:0.025, graphene is mixed into caprolactam, and catalytic polymerization is used to make cast nylon composite materials. The specific preparation method is as follows:

[0022] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring conditions, melt the caprolactam at a temperature of 110°C, add 0.025 parts of graphene, and add 0.025 parts of graphene at an ultrasonic power of 150w, a frequency of 150Hz, and a mechanical stirring rate of 600rpm. at 110° C. and dispersed for 30 minutes to obtain a graphene caprolactam dispersion. At a temperature of 130°C and a vacuum of 0.092 MPa, dehydrate for 20 minutes. Then add 0.25 parts of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.092 MPa. ...

Embodiment 3

[0024] A kind of specific embodiment of cast nylon composite material of the present invention is as follows:

[0025] Using the technical scheme of caprolactam and graphene weight ratio of 100:0.035, graphene is mixed into caprolactam, and catalyzed polymerization is made into cast nylon composite material. The specific preparation method is as follows:

[0026] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic device under continuous stirring, melt the caprolactam at a temperature of 110°C, add 0.035 parts of graphene, and add 0.035 parts of graphene at an ultrasonic power of 160w, a frequency of 150Hz, and a mechanical stirring rate of 700rpm. at 110° C. and dispersed for 30 minutes to obtain a graphene caprolactam dispersion. At a temperature of 130°C and a vacuum of 0.098MPa, dehydrate for 20 minutes. Then add 0.25 parts of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.098 MPa. Open the valve ...

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Abstract

The invention discloses a monomer casting nylon composite which is prepared through the catalytic polymerization of caprolactam doped with graphene, wherein the weight ratio of caprolactam to graphene is 100:(0.005-0.095). The invention has the following beneficial effect: the dosage of graphene in caprolactam is changed, thus the mechanical properties and friction performances of the polymerizedmonomer casting nylon can be increased, particularly the impact resistance and wear resistance can be greatly increased, the impact strength is 2-4 times that of the material prepared by the prior art and the volume erosion rate is 7.7%-26.8% of that of the material prepared by the prior art. Therefore, the composite can be used to prepare workpieces with wider application range.

Description

technical field [0001] The invention relates to a cast nylon composite material, in particular to a cast nylon composite material modified by graphene, and to the technical field of polymer composite materials. Background technique [0002] Cast nylon (monomer casting nylon, or MC nylon) is to use a strong basic substance as a catalyst for the molten caprolactam monomer as a raw material under normal pressure, and together with a cocatalyst, directly inject it into a mold that is preheated to a certain temperature. The material undergoes a polymerization reaction quickly in the mold and condenses into a tough solid product. Cast nylon has a high degree of polymerization, high molecular weight and crystallinity, and has better performance than other engineering plastics. It is widely used to manufacture wear-resistant and anti-friction parts, especially for large-scale products that cannot be solved by injection molding and compression molding. Gradually replace copper, alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08K3/04
Inventor 潘炳力赵菁王利平王峻岭罗洁刘金龙张玉清张永振
Owner HENAN UNIV OF SCI & TECH
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