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Nano-carrier catalyst for producing reinforced polyethylene and its preparation method and application

A nano-carrier and catalyst technology, which is applied in the production of nano-carrier catalysts for reinforced polyethylene and its preparation, can solve the problems of few registrations, the indistinct advantages of nanomaterials, and the impact on the industrial application prospects of polyolefin nanocomposites. Achieve the effects of avoiding sticking, easy flow and transmission, and high strength

Active Publication Date: 2016-03-23
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purpose of previous research is mainly to use nanomaterials as catalyst carriers to give full play to their loading characteristics, and the advantages of nanomaterials in polyolefin materials are not obvious.
At the same time, few studies have focused on problems in the process of industrial application, such as the particle appearance of polyolefin composite materials. These problems affect the industrial application prospects of polyolefin nanocomposites and are key issues that need to be solved urgently. very few reports

Method used

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  • Nano-carrier catalyst for producing reinforced polyethylene and its preparation method and application
  • Nano-carrier catalyst for producing reinforced polyethylene and its preparation method and application
  • Nano-carrier catalyst for producing reinforced polyethylene and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] Preparation of Ziegler-Natta nano-carrier catalyst system;

Embodiment 1a

[0151] Preparation of nanocarrier catalysts:

[0152] Under the protection of nitrogen, add 4g of anhydrous magnesium chloride powder, 20ml of absolute ethanol and 50ml of n-heptane into a stirred reaction flask, and stir at 100°C until the magnesium chloride dissolves. Then add the following nanomaterials: 4g nano-montmorillonite, 4g hydroxyl-modified carbon nanotubes and fully stir for 2 hours. Then cool down to room temperature to obtain the nanocomposite MgCl2·CNT·Clays·xETOH. Add a certain amount of TEA (Al / Mg=3) to the above system, react at 60°C for 2 hours, add 50ml of n-heptane to wash 4 times to remove unreacted TEA, dry under vacuum conditions, and get good fluidity Carrier Mg-S.

[0153] Take the carrier Mg-S, add 50ml n-heptane and a certain amount of TiCl 4 , react at 60°C for 2h, add 50ml of n-heptane to wash 4 times to remove unreacted TiCl 4 , dried under vacuum to obtain a free-flowing solid catalyst Cat-Mg.

[0154] Slurry polymerization: The reaction d...

Embodiment 1b

[0157] The same method as in Example 1a was used to prepare the nanocarrier catalyst, except that the nanomaterials were changed to 4g nanohydrotalcite and 4g single-walled carbon nanotubes. Slurry polymerization was carried out following the same procedure as Example 2a. The calculated catalytic activities and properties of the polyethylene resins tested according to the above test methods are listed in Table 1.

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Abstract

The invention relates to a nano-carrier catalyst for producing reinforced polyethylene as well as preparation method and application of the catalyst. The nano-carrier catalyst is prepared from raw materials of nano clay or modified nano clay, a carbon nanotube or a modified carbon nanotube and a reactive magnesium chloride system or a silicon dioxide system, and a transition metal catalyst is loaded on a nano composite support to obtain the nano-carrier catalyst; a polymerization reaction is performed on a vinyl monomer, a comonomer, a promoter and the catalyst loaded on the nano composite support, so as to obtain a multi-dimensional nano enhanced polyethylene-based composite material. In the nano composite material, laminated clay and clubbed carbon nanotube can be uniformly dispersed, to enhance the strength and toughness of the composite material, so as to form the polyethylene-based nano composite material with nano materials in multi-dimensional size mutually reinforced; the nano-carrier catalyst, which is more uniform in component dispersion, is more excellent in electric performance and mechanical performance in comparison with polyethylene obtained from other catalysts, and the catalyst has wide application prospect in auto parts, packing materials, barrier materials, electric appliance materials and other fields.

Description

technical field [0001] The invention relates to a multidimensional nano-carrier catalyst, in particular to a nano-carrier catalyst for producing reinforced polyethylene, its preparation method and application. Background technique [0002] Polyolefin is the polymer material variety with the largest output and widest application, and is an indispensable basic raw material for national life and modern national defense. The emergence of nanotechnology provides a broad space for the improvement of the performance of polyolefin materials. In nanocomposites, due to the uniform dispersion of nanoscale inorganic dispersed phases in polymers, there are nanoscale effects, large specific surface areas, and strong interfacial interactions. Its performance is often significantly better than that of conventional composite materials with the same components, and it has the advantages of high specific strength, strong designability, and good fatigue resistance, which has a huge impact on pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F4/02
Inventor 张乐天乔新峰叶晓峰肖明威
Owner SHANGHAI RES INST OF CHEM IND