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Method of preparing nano-polyethylene fiber by normal pressure extrusion polymerization

A polyethylene fiber, extrusion polymerization technology, applied in the field of preparing nanometer polyethylene fibers, can solve the problems of high polymerization pressure, increase equipment requirements and production costs, and achieve the effects of simple loading process, easy industrial production, and simple process

Inactive Publication Date: 2006-01-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Both methods require high polymerization pressure during the polymerization process, thus increasing equipment requirements and production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Under the protection of nitrogen, add 50ml of toluene and 0.55 grams of MCM-41 (pore size is 2.9nm) that have been treated at 400°C in a 100ml three-necked flask, wash with toluene three times with 0.3ml MAO at room temperature for 2 hours; then add 0.09 mmol Cp 2 ZrCl 2 , after stirring and reacting at 50° C. for 1 hour, wash with toluene three times, and remove the toluene solvent in a vacuum to obtain a powdery solid catalyst with a zirconium loading of 0.16 mmol Zr / g.

[0022] Under normal pressure at 50°C, add 50ml of toluene to a three-necked flask, add 2.1ml of MAO and stir for a few minutes after ethylene is saturated in toluene, then add 11.1mg of supported catalyst ([Al] / [Zr]=2000), react for 30 Minutes later, it is terminated with acidified ethanol, and the product is filtered, washed and dried to obtain nano polyethylene fibers with a diameter of 80-100 nm.

Embodiment 2

[0024] Using the supported catalyst prepared in Example 1, carry out ethylene polymerization at 50°C under normal pressure, [Al] / [Zr]=2000, and the reaction time is 5 minutes. The product is filtered, washed, and dried to obtain a 100nm nano polyethylene fiber.

Embodiment 3

[0026] Using the supported catalyst prepared in Example 1, carry out ethylene polymerization at 30°C under normal pressure, [Al] / [Zr]=2000, the reaction time is 30 minutes, the product is filtered, washed, and dried to obtain a diameter of 80-100nm nano-polyethylene fibers.

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PUM

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Abstract

A process for preparing the polyethene nanofibres includes such steps as mixing meso-porous molecular sieve MCM-41 or SBA-15 with MAO in toluene solution, stirring, washing with toluene, dissolving Cp2ZrCl2 in toluene, adding the MAO treated suspension, reacting while stirring, washing with toluene, vacuum removal of toluene to obtain carried catalyst, mixing ethane with said catalyst and MAO as co catalyst and extrusion polymerizing. Said steps are performed in high-purity N2.

Description

technical field [0001] The present invention relates to a kind of using mesoporous molecular sieve MCM-41 or SBA-15 to load Cp 2 ZrCl 2 Catalyst, normal pressure extrusion polymerization method for preparing nano polyethylene fiber. technical background [0002] With the development of the polymerization industry, people have been able to achieve the control of polymer molecular weight, comonomer sequence and stereo sequence. However, the polymer used in practice still needs to have a certain form. Therefore, the business community and the academic circle have been pursuing the control of the polymer form during the polymerization process, especially the control of the polymer fiber form. Usually, in order to obtain a certain shape, some post-processing steps such as extrusion or spinning are applied in the industry to obtain a specific shape of the polymer, but these preparation methods require specific equipment and complicated processing procedures. [0003] Aida et al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F4/642B29C47/00
Inventor 董晓臣王立孙天旭俞豪杰
Owner ZHEJIANG UNIV
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