Anti-freezing polyethylene power tube and preparation method thereof

A power pipe and polyethylene technology, which is applied to the field of antifreeze polyethylene power pipe and its preparation, can solve the problems of unsatisfactory impact strength, low toughness of high-density polyethylene, poor environmental stress cracking energy, etc., and achieve mechanical properties. Enhance, increase impact strength, meet the effect of mechanical properties

Inactive Publication Date: 2020-07-24
杭州联通管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the high-density polyethylene, toughening agent, filler, coupling agent, plasticizer and bridging agent in the above-mentioned patent scheme make the power cable protection tube produced have the characteristics of good low temperature resistance and long service life; There are also the following disadvantages: the high-density polyethylene used has the disadvantages of low toughness, low hardness, and poor environmental stress cracking performance. It is used for power pipes buried underground. If the ground is crushed by heavy vehicles, its impact strength cannot reach to request

Method used

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  • Anti-freezing polyethylene power tube and preparation method thereof
  • Anti-freezing polyethylene power tube and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the antifreeze polyethylene power pipe of this embodiment includes the following steps:

[0030] 1. Weigh 10kg of carbon nanotubes and disperse them in a mixture of 98% concentrated sulfuric acid and 68% concentrated nitric acid with a volume ratio of 3:1. The mixed solution has a mass of 22.5kg. After mixing, use ultrasound. Vibrate, ultrasonic frequency 25000HZ, reaction time 2.5 hours, then filter and clean with deionized water to obtain carbon nanotubes with carboxyl groups after cutting;

[0031] 2. Take 100 parts of high-density polyethylene and heat it to 110°C. After the high-density polyethylene is completely melted, add the cut carbon nanotubes, stir well, and then add 15kg of potassium permanganate powder and stir. React for 35 minutes, add 0.4kg of trimethyltin after the reaction is complete, and stir evenly;

[0032] 3. The above reaction product is cooled and pelletized to obtain carbon nanotube modified high-density polyethylene.

[003...

Embodiment 2

[0037] The preparation method of the antifreeze polyethylene power pipe of this embodiment includes the following steps:

[0038] 1. Weigh 10kg of carbon nanotubes and disperse them in a mixture of 98% concentrated sulfuric acid and 68% concentrated nitric acid with a volume ratio of 3:1. The mixed solution has a mass of 20kg. After mixing, use ultrasound Oscillate, ultrasonic frequency 20000HZ, reaction time 2 hours, then filter and clean with deionized water to obtain carbon nanotubes with carboxyl groups after cutting;

[0039] 2. Take 100 parts of high-density polyethylene and heat it to 100°C. After the high-density polyethylene is completely melted, add the cut carbon nanotubes, stir well, and then add 10kg of potassium permanganate powder and stir. React for 30 minutes, add 0.2kg of trimethyltin after the reaction is complete, and stir evenly;

[0040] 3. The above reaction product is cooled and pelletized to obtain carbon nanotube modified high-density polyethylene.

[0041] ...

Embodiment 3

[0045] The preparation method of the antifreeze polyethylene power pipe of this embodiment includes the following steps:

[0046] 1. Weigh 10kg of carbon nanotubes and disperse them in a mixture of 98% concentrated sulfuric acid and 68% concentrated nitric acid with a volume ratio of 3:1. The mixed solution has a mass of 25kg. After mixing, use ultrasonic Oscillate, ultrasonic frequency 30000HZ, reaction time 3 hours, then filter and clean with deionized water to obtain carbon nanotubes with carboxyl groups after cutting;

[0047] 2. Take 100 parts of high-density polyethylene and heat it to 120°C. After the high-density polyethylene is completely melted, add the cut carbon nanotubes, stir well, and then add 20kg of potassium permanganate powder and stir. React for 40 minutes, add 0.4kg of trimethyltin after the reaction is complete, and stir evenly;

[0048] 3. The above reaction product is cooled and pelletized to obtain carbon nanotube modified high-density polyethylene.

[0049] ...

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Abstract

The invention belongs to the technical field of power protection pipelines, and particularly relates to an anti-freezing polyethylene power tube and a preparation method thereof. The anti-freezing polyethylene power tube is prepared from 10 to 12 parts of carbon nano tube modified high-density polyethylene, 88 to 90 parts of high-density polyethylene, 3 to 5 parts of toughening agent, 3 to 5 partsof filling agent, 6 to 8 parts of coupling agent, 1 to 2 parts of plasticizer and 1 to 2 parts of bridging agent. The preparation method comprises the following steps: stirring and reacting the carbon nanotube modified high-density high-density polyethylene, high-density polyethylene, basic magnesium sulfate whisker, KH550 silane, acrylate rubber, silicon dioxide, dioctyl maleate and trimethylhexamethylenediamine to obtain molten liquid; and then placing the molten liquid in a double-screw extruder, wherein the temperature of the feeding section is controlled to be 100-110 DEG C, the temperature of the connector is controlled to be 150-160 DEG C, the temperature of the moth model is controlled to be 220-260 DEG C, the temperature of the core mold temperature controller is controlled to be195-205 DEG C, the extrusion speed is 1.0-1.6 m / min, and thus the power tube is obtained. The power tube has good low-temperature resistance and has strong mechanical properties such as impact strength, tensile strength, elongation at break and the like.

Description

Technical field [0001] The invention belongs to the technical field of power protection pipelines, and specifically relates to an antifreeze polyethylene power pipe and a preparation method thereof. Background technique [0002] The current power pipe is a product made of PE (modified polyethylene) for hot dipping or epoxy resin for internal and external coating, and has excellent corrosion resistance. At the same time, the coating itself has good electrical insulation and will not cause electrical corrosion. Low water absorption, high mechanical strength, low friction coefficient, can achieve the purpose of long-term use. It can also effectively prevent damage to plant roots and soil environmental stress. [0003] Power pipes mostly use buried pipe laying, and the power pipes need to be welded. After the welding is completed, natural cooling is required. Because the temperature is lower in winter, the natural cooling is faster, and the pipes are easy to freeze. In addition, pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L33/04C08K13/06C08K7/08C08K5/544C08K3/36C08K9/02C08K3/04C08K5/57
CPCC08L23/06C08L2203/18C08L2203/20C08L2207/062C08L33/04C08K13/06C08K7/08C08K5/544C08K3/36C08K9/02C08K3/041C08K5/57
Inventor 陈毅明孙东华裘杨燕傅亚斌齐国良
Owner 杭州联通管业有限公司
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