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Polyethylene in super molecular weight modified by Nano silicon rubber its prepn. provess and usage

An ultra-high molecular weight, nano-silicone rubber technology, applied in the application of silicone rubber-modified ultra-high molecular weight polyethylene in wear-resistant pipes, the field of silicone rubber-modified ultra-high molecular weight polyethylene and its preparation, can solve molecular weight, mechanical Performance and friction resistance and other performance differences, to achieve the effect of reducing processing viscosity, excellent high molecular weight, and reducing temperature and time

Inactive Publication Date: 2005-11-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of a large amount of low-molecular additives in this method, although the basic properties of UHMWPE can be basically maintained in the final product, its actual molecular weight, mechanical properties, and friction resistance are quite different from those of real UHMWPE.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Formulate according to the following components and contents:

[0041] Ultra-high molecular weight polyethylene (molecular weight: 2.5 million) 95wt%

[0042] Nano silicone rubber 3wt%

[0043] Calcium stearate 1wt%

[0044] FX-9511 0.5wt%

[0045] NA-11 0.5wt%

[0046] The molecular weight of 95wt% is 2.5 million ultra-high molecular weight polyethylene, 0.5wt% of NA-11, 1wt% of calcium stearate and 0.5wt% of poly-α-methylstyrene, and the total weight of the above formula 2wt‰ The antioxidant 1010 was mixed in a high-speed mixer for 6 minutes, then nano-silica rubber with a particle size of 50nm was added, and stirred for 2 minutes. Put the uniformly mixed material into a twin-screw extruder with an aspect ratio of 30 for blending and granulation. The temperature of the front section of the screw barrel is 120-140°C, the middle section is 160-180°C, and the temperature of the head section is 180-220°C. , The die temperature is 200°C. Among them, the front and mid...

Embodiment 2

[0048] Formulate according to the following components and contents:

[0049] Ultra-high molecular weight polyethylene (molecular weight: 3 million) 92wt%

[0050] Nano silicone rubber 3.5wt%

[0051] Polyethylene wax (molecular weight 2000) 3wt%

[0052] FX5920 1wt%

[0053] DBS 0.5wt%

[0054] The molecular weight of 92wt% is 3 million UHMWPE, 0.5wt% DBS, 3wt% polyethylene wax (molecular weight 2000) and 1wt% FX5920, and the antioxidant 1790 of above-mentioned formula total weight 3wt‰ in Mix in a high-speed mixer for 8 minutes, then add nano-silica rubber with a particle size of 50 nm, and stir for 2 minutes. Put the uniformly mixed material into a twin-screw extruder with an aspect ratio of 28 for blending and granulation. The temperature of the front section of the screw barrel is 130-150°C, the middle section is 170-180°C, and the temperature of the head section is 180-220°C. , The die temperature is 200°C. Among them, the front and middle sections of the screw are...

Embodiment 3

[0056] Formulate according to the following components and contents:

[0057] Ultra-high molecular weight polyethylene (molecular weight 2 million) 91wt%

[0058] Nano silicone rubber 2wt

[0059] Methylene bis stearamide 5wt%

[0060] FX9613 1.5wt%

[0061] DMDBS 0.5wt%

[0062] The molecular weight of 91wt% is 1,500,000 ultra-high molecular weight polyethylene, 0.5wt% DMDBS, 5wt% polyethylene wax (molecular weight 2000) and 1.5wt% FX5920, and the antioxidant 2246 of above-mentioned formula total weight 2wt‰ Mix in a high-speed mixer for 5 minutes, then add nano-silica rubber with a particle size of 50 nm, and stir for 1 minute. Put the uniformly mixed material into a twin-screw extruder with an aspect ratio of 35 for blending and granulation. The temperature of the front section of the screw barrel is 110-130°C, the middle section is 150-160°C, and the temperature of the head section is 180-200°C. , The die temperature is 200°C. Among them, the front section and the mi...

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Abstract

A nano-class silica rubber modified ultrahigh-molecular polyethene used for antiwear pipe is prepared through proportionally mixing ultrahigh-molecular polyethene, nucleator, lubricant, rheological asistant and antioxidizing agent, high-speed stirring, adding silica rubber nanoparticles, stirring, and dual-screw extruding out to obtain granular product.

Description

technical field [0001] The invention belongs to the field of polymer modification, and in particular relates to silicon rubber modified ultra-high molecular weight polyethylene and a preparation method thereof, and the application of silicon rubber modified ultra-high molecular weight polyethylene in wear-resistant pipes. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) is a thermoplastic with extremely high molecular weight. "Excellent performance, difficult processing" fully reflects the characteristics of this material. Compared with many polymer materials, UHMWPE has a small friction coefficient, low wear, chemical resistance, impact resistance, pressure resistance, frost resistance, thermal insulation, self-lubricating properties, anti-fouling properties, stress cracking resistance and hygienic properties. These excellent properties make UHMWPE pipes have important practical value. UHMWPE pipes have extremely high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06
Inventor 刘必前李兰张洪志
Owner INST OF CHEM CHINESE ACAD OF SCI
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