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Ionic crosslinking ultra-high molecular weight polyethylene material with self-repairing function and preparation method thereof

An ultra-high molecular weight, ion-crosslinking technology, applied in the field of ion-crosslinking ultra-high molecular weight polyethylene materials and preparation, to facilitate large-scale industrial production, expand application fields, and have excellent wear resistance.

Active Publication Date: 2020-01-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, UHMWPE with self-healing function has not been reported

Method used

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  • Ionic crosslinking ultra-high molecular weight polyethylene material with self-repairing function and preparation method thereof
  • Ionic crosslinking ultra-high molecular weight polyethylene material with self-repairing function and preparation method thereof
  • Ionic crosslinking ultra-high molecular weight polyethylene material with self-repairing function and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] An ionically cross-linked ultra-high molecular weight polyethylene material with self-healing function, the specific formula is: UHMWPE: 100Kg, high-density polyethylene: 12Kg, linear low-density polyethylene: 6Kg, zinc oxide: 2Kg Zinc stearate: 2Kg, dicumyl peroxide: 0.25Kg, acrylic acid: 3Kg, styrene: 1Kg.

[0034] The specific preparation process is as follows:

[0035] a Pre-dispersion: First, the molecular weight of 2.0 × 10 6 g / mol UHMWPE, high-density polyethylene, linear low-density polyethylene, zinc oxide and zinc stearate were placed in a high-speed mixer at 80 °C and mixed uniformly. Dicumyl peroxide, acrylic acid and styrene were dissolved in acetone and then misted. It is uniformly dispersed in UHMWPE / oxide / zinc stearate system;

[0036] b Reactive blending: The pre-dispersed samples are melt-reactively blended using a batch extensional rheological mixer, the temperature is 180°C, the time is 17min, and the rotation speed is 30rpm;

[0037] c Molding: T...

Embodiment 2

[0044] An ionically cross-linked ultra-high molecular weight polyethylene material with self-healing function, the specific formula is: UHMWPE: 100Kg, high-density polyethylene: 26Kg, linear low-density polyethylene: 15Kg, magnesium oxide: 9Kg, magnesium stearate : 6Kg, bis-2,5-dimethyl-2,5-bis(tert-butylperoxy)-hexane: 0.8Kg, methacrylic acid: 8Kg, styrene: 3.5Kg.

[0045] Its preparation process is as follows:

[0046] a Pre-dispersion: First, the molecular weight of 5.5 × 10 6g / mol UHMWPE, high-density polyethylene, linear low-density polyethylene, magnesium oxide and magnesium stearate were mixed uniformly in a high-speed mixer at 80 °C, and the bis-2,5-dimethyl-2,5-bis(tert- Butyl peroxy)-hexane, methacrylic acid and styrene are dissolved in tetrahydrofuran, atomized and uniformly dispersed in UHMWPE / oxide / magnesium stearate system;

[0047] b Reactive blending: The pre-dispersed samples are melt-reactively blended using a batch extensional rheological mixer, the temper...

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Abstract

The invention discloses an ionic crosslinking ultra-high molecular weight polyethylene material with a self-repairing function and a preparation method of the ionic crosslinking ultra-high molecular weight polyethylene material. The material comprises the following components in parts by weight: 100 parts of UHMWPE, 10-30 parts of high-density polyethylene, 5-20 parts of linear low-density polyethylene, 1-10 parts of an oxide, 2-8 parts of a stearate, 0.2-1 part of a peroxide, 2-10 parts of a functional monomer and 1-4 parts of a second monomer. The ionic crosslinking ultra-high molecular weight polyethylene material is excellent in wear resistance; tensile strength, elongation at break, friction coefficient and abrasion loss all meet the standard; the performance is excellent; and microcrack self-repairing function is also realized, so that the service life of UHMWPE in high-strength structural parts is prolonged, and the application field of the UHMWPE material is greatly expanded; the preparation process of the ionic crosslinking ultra-high molecular weight polyethylene material is simple, convenient to operate and convenient for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more particularly, to an ion-crosslinked ultra-high molecular weight polyethylene material with self-healing function and a preparation method. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) has many advantages such as high impact strength, strong wear resistance, low friction coefficient, good biocompatibility, etc. application. With the rapid development of the UHMWPE industry and the significant improvement in the synthesis and processing technology of UHMWPE, the application of UHMWPE materials in high-strength structural parts has become increasingly widespread. Although the new processing method can well solve the difficult problem of UHMWPE processing, and also significantly improve the mechanical properties, there is still a big gap between its wear resistance and cross-linked UHMWPE, and it needs subsequent cross-linking treatment to meet t...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F220/06C08F222/06C08F212/08C08K3/22C08K5/098
CPCC08F255/02C08K3/22C08K5/098C08K2003/222C08K2003/2296C08K2003/2206C08F220/06C08F222/06C08F212/08
Inventor 余丁山曹长林陈潇川王军霞陈旭东
Owner SUN YAT SEN UNIV
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