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High-pressure molded UHMWPE/PA6 (ultrahigh molecular weight polyethylene/polyamide 6) alloy and preparation method thereof

An alloy and molding technology, applied in the field of high-pressure molding UHMWPE/PA6 alloy and its preparation, can solve the problems of poor mechanical properties and poor compatibility of final materials, and achieve an effective preparation method, better mechanical properties and wear resistance. The effect of excellent wear resistance and mechanical properties

Inactive Publication Date: 2014-10-08
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since UHMWPE is a non-polar material, and nylon is a strong polar material, the compatibility between them is poor, resulting in poor mechanical properties of the final material, so it is often necessary to add a compatibilizer density polyethylene grafted maleic anhydride (HDPE- g-MAH) etc. to obtain good mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of UHMWPE-g-MAH: Mix 70 parts of ultra-high molecular weight polyethylene with a molecular weight of 1 million, 30 parts of high-density polyethylene, 5 parts of maleic anhydride and 0.05 parts of dicumyl peroxide in a high-speed mixer Mix evenly in an extruder, extrude in an extruder, then add to a pulverizer to pulverize, grind, and sieve to obtain UHMWPE-g-MAH pellets with a particle size of 100-200 μm; the feeding section of the extruder is 150 ° C, and the melting section 170°C, reaction section 190°C.

[0030] (2) Preparation of nylon 6 powder: pulverize and grind nylon 6 pellets in a high-speed universal pulverizer, and sieve to obtain nylon 6 powder with a particle size of 100-200 μm.

[0031] (3) Preparation of UHMWPE / PA6 alloy composite powder: 30 parts of ultra-high molecular weight polyethylene with a molecular weight of 5 million, 70 parts of PA6 powder, 5 parts of UHMWPE-g-MAH, 0.5 parts of maleic anhydride grafted polyethylene wax, 0.2 Pu...

Embodiment 2

[0035] (1) Preparation of UHMWPE-g-MAH: Put 90 parts of ultra-high molecular weight polyethylene with a molecular weight of 1 million, 10 parts of high-density polyethylene, 0.5 parts of maleic anhydride and 0.2 parts of dicumyl peroxide in a high-speed mixer Mix evenly in the medium, add to the extruder to react and extrude, then add to the high-speed universal pulverizer for crushing and grinding, and sieve to obtain UHMWPE-g-MAH pellets with a particle size of 100-200 μm. The feeding section of the extruder is 140°C, the melting section is 160°C, and the reaction section is 180°C.

[0036] (2) Preparation of nylon 6 powder: pulverize and grind nylon 6 pellets in a high-speed universal pulverizer, and sieve to obtain nylon 6 powder with a particle size of 100-200 μm.

[0037] (3) Preparation of UHMWPE / PA6 alloy composite powder: 70 parts of ultra-high molecular weight polyethylene with a molecular weight of 5 million, 30 parts of PA6 powder, 10 parts of UHMWPE-g-MAH, 5 parts...

Embodiment 3

[0041] (1) Preparation of UHMWPE-g-MAH: Mix 80 parts of ultra-high molecular weight polyethylene with a molecular weight of 1 million, 20 parts of high-density polyethylene, 2.5 parts of maleic anhydride and 0.1 part of dicumyl peroxide in a high-speed mixer Mix evenly in the medium, add to the extruder to react and extrude, then add to the high-speed universal pulverizer for crushing and grinding, and sieve to obtain UHMWPE-g-MAH pellets with a particle size of 100-200 μm. In the reactive extrusion, the feeding section is 160°C, the melting section is 180°C, and the reaction section is 200°C.

[0042] (2) Preparation of nylon 6 powder: pulverize and grind nylon 6 pellets in a high-speed universal pulverizer, and sieve to obtain nylon 6 powder with a particle size of 100-200 μm.

[0043] (3) Preparation of UHMWPE / PA6 alloy composite powder: 50 parts of ultra-high molecular weight polyethylene with a molecular weight of 5 million, 50 parts of PA6 powder, 20 parts of UHMWPE-g-MA...

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Abstract

The invention discloses high-pressure molded UHMWPE / PA6 (ultrahigh molecular weight polyethylene / polyamide 6) alloy and a preparation method thereof. The preparation method comprises the following steps: mixing 30-70 parts by weight of ultrahigh molecular weight polyethylene, 70-30 parts by weight of polyamide 6 powder, 5-20 parts by weight of maleic anhydride-grafted ultrahigh molecular weight polyethylene, 0.5-5 parts by weight of maleic anhydride-grafted polyethylene wax and 0.1-1 part of an antioxidant, and performing mold forming to obtain the UHMWPE / PA6 alloy. According to the preparation method, maleic anhydride grafted ultrahigh molecular weight polyethylene is adopted as a compatilizer, and particle micronization treatment is carried out so that the particle sizes of ultrahigh molecular weight polyethylene, polyamide 6 and maleic anhydride-grafted ultrahigh molecular weight polyethylene are all 100-200 microns and at the same level, the compatibility and dispersity between ultrahigh molecular weight polyethylene and polyamide 6 are improved, and the prepared UHMWPE / PA6 alloy has excellent wear resistance and mechanical property.

Description

[0001] technical field [0002] The invention belongs to the technical field of polymer materials, and in particular relates to a high-pressure molded UHMWPE / PA6 alloy and a preparation method thereof. [0003] Background technique [0004] As a general-purpose engineering plastic, nylon has high mechanical strength and good self-lubricating properties, and is widely used in the field of anti-friction and wear resistance. However, due to its much higher surface energy than polytetrafluoroethylene (PTFE) and polyethylene (PE), its friction coefficient is high during dry friction, and it has the disadvantage of strong water absorption, which limits its application in the friction field. Wider application. Ultra-high molecular weight polyethylene (UHMWPE) has excellent impact resistance, wear resistance, low temperature resistance and self-lubricating properties, and its blending with PA6 can improve the low temperature impact toughness, dimensional stability and friction...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L77/02C08L51/06C08F255/02C08K5/134C08K5/526
CPCC08L23/06C08F255/02C08L77/02C08L2205/025C08L2205/035C08L2207/068C08L51/06C08F222/06
Inventor 杨桂生苏荣锦吕励耘
Owner HEFEI GENIUS NEW MATERIALS
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