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

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...

Examples

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...

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...

Examples

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...