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Manufacturing method of nano carbon black through in-situ polyethylene grafting

A technology of nano-carbon black and in-situ grafting, which is applied in the field of polyolefin modification, can solve the problems of easy decomposition and large side effects, and achieve the effect of no solvent, low cost and improved mechanical properties

Inactive Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these light stabilizers are organic compounds, which are easy to decompose and have relatively large side effects.

Method used

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  • Manufacturing method of nano carbon black through in-situ polyethylene grafting
  • Manufacturing method of nano carbon black through in-situ polyethylene grafting
  • Manufacturing method of nano carbon black through in-situ polyethylene grafting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Graft nano-carbon black using polyethylene: 160g of nano-carbon black, high-density polyethylene SC-332g.

[0029] Nano-carbon black and polyethylene were blended in HAAKE torque rheometer at 140°C, the screw speed was 100rpm, and the blending time was 15min. Under these conditions, polyethylene SC-3 was grafted with nano-carbon in situ black.

[0030] In order to characterize the grafted nano-carbon black, it is necessary to remove the unreacted polyethylene in the system, and the pure grafted nano-carbon black is obtained by the following method: the reactant of the above-mentioned nano-carbon black and polyethylene is dissolved in xylene , after stirring and refluxing at 130-140°C for at least 72 hours, place the dispersion in a high-speed centrifuge (Beijing Medical Centrifuge Factory) and settle for 20 minutes, pour the upper layer solution, and redisperse the settled nano-carbon black in xylene In the solution, centrifugation was carried out until no polyethylene...

Embodiment 2

[0035] Graft nano-carbon black using polyethylene: 160g of nano-carbon black, 32g of high-density polyethylene pipe material DBGB2480H.

[0036] Nano-carbon black and polyethylene were blended in HAAKE torque rheometer at 140 ° C, the screw speed was 100 rpm, and the blending time was 15 min. Under these conditions, polyethylene DBGB2480H was grafted with nano-carbon black in situ.

[0037] In order to characterize the grafted nano-carbon black, it is necessary to remove the unreacted polyethylene in the system, and the pure grafted nano-carbon black is obtained by the following method: the reactant of the above-mentioned nano-carbon black and polyethylene is dissolved in xylene , after stirring and refluxing at 130-140°C for at least 72 hours, place the dispersion in a high-speed centrifuge (Beijing Medical Centrifuge Factory) and settle for 20 minutes, pour the upper layer solution, and redisperse the settled nano-carbon black in xylene In the solution, centrifugation was ca...

Embodiment 3

[0040]Graft nano-carbon black using polyethylene: 160g of nano-carbon black, 704232g of linear low-density polyethylene.

[0041] Nano-carbon black and polyethylene were blended in HAAKE torque rheometer at 140°C, the screw speed was 100rpm, and the blending time was 15min. Under these conditions, polyethylene 7042 was grafted with nano-carbon black in situ.

[0042] In order to characterize the grafted nano-carbon black, it is necessary to remove the unreacted polyethylene in the system, and the pure grafted nano-carbon black is obtained by the following method: the reactant of the above-mentioned nano-carbon black and polyethylene is dissolved in xylene , after stirring and refluxing at 130-140°C for at least 72 hours, place the dispersion in a high-speed centrifuge (Beijing Medical Centrifuge Factory) and settle for 20 minutes, pour the upper layer solution, and redisperse the settled nano-carbon black in xylene In the solution, centrifugation was carried out until no polye...

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Abstract

The invention relates to a manufacturing method of nano carbon black through in-situ polyethylene grafting, belonging to the technical field of polyolefin modification. Nano carbon black and polyethylene capable of degrading to produce active free radicals are mixed in a mechanical shear force field, and the nano carbon black is prepared directly through grafting reaction at the temperature above the melting point of the polyethylene for production of the active free radicals. The prepared nano carbon black has good dispersibility and compatibility. When the nano carbon black is filled into a polyethylene matrix, a high-performance polyethylene product can be prepared. The process of the preparation method of the nano carbon black is simple, no solvents are needed, the cost is low, and no pollution can be caused. Moreover, high-volume continuous production can be realized, and the grafted nano carbon black can be applied to production of high-performance polyethylene composite materials such as high-grade polyethylene pipes and the like.

Description

technical field [0001] The invention relates to a method for producing nano-carbon black grafted in situ with polyethylene, and belongs to the technical field of polyolefin modification. Background technique [0002] Polyolefin is currently a type of polymer material with the widest application range and the largest output. Half of my country's polyolefin market of more than 20 million tons per year relies on imports, and the output value of direct products is hundreds of billions of yuan and the output value of indirect products is trillions of yuan. It costs tens of billions of dollars in foreign exchange to import polyolefin products in my country every year, mainly for high-performance polyolefin special materials, such as the high-grade PE100 grade poly Ethylene pipe materials are still completely dependent on imports. Even in the field of general-purpose polyolefin products, my country is facing severe challenges from ultra-low-cost products from the Middle East. Techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/56C09C3/10C08K9/04C08K3/04C08L23/06
Inventor 王群涛何雪莲刘柏平郭锐柴永庆王日辉王耀煌齐欣
Owner CHINA PETROLEUM & CHEM CORP
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