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Preparation method of functionalized polypropylene copolymer

A polypropylene copolymer, functionalized technology, applied in the field of preparation of functionalized polypropylene copolymer, to achieve the effects of enhancing printing and dyeing properties, expanding application fields, and improving compatibility

Inactive Publication Date: 2020-11-24
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But so far, there are few reports on the precise control of the grafting density and grafting quantity of functionalized functional groups by catalyzing the oligomerization of propylene through cobalt imidazole complexes.

Method used

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  • Preparation method of functionalized polypropylene copolymer
  • Preparation method of functionalized polypropylene copolymer
  • Preparation method of functionalized polypropylene copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add o-dichlorobenzene (0.1 mol) in methanol (20 mL) dropwise with imidazole (0.25 mol) in absolute ethanol (40 mL). A few drops of 5% sodium hydroxide in ethanol were added to the reaction mixture. Reflux at 80°C for 8 hours and then allow overnight. The sodium chloride was filtered, the filtrate was evaporated and recrystallized from ethanol, the yield of 1,2-diimidazobenzene was 89%.

Embodiment 2

[0019] Take a 100ml reactor, add 50ml tetrahydrofuran, add 190mg 1,2-diimidazolium benzene, add 305mg NiBr2 (DME), stir for 12 hours, spin off the solvent, and obtain a light yellow powder as 1,2-diimidazolium cobalt bromide, Yield 97%.

Embodiment 3

[0021] A dry 250ml autoclave with a magnetic stirring bar was replaced three times with nitrogen and twice with propylene. Heat the oil bath to 50°C, add 100ml of toluene, 1mL of 7-octen-1 alcohol, 4ml of MAO, start stirring, add 1.2mmol of 1,2-diimidazolium benzene cobalt bromide catalyst with a syringe, and control the propylene pressure of the system with a solenoid valve Keep 1.03×10 6 Pa, start to carry out propylene copolymerization. After 30 minutes, the propylene valve was closed, treated with acid alcohol, and filtered to obtain 9.8 g of copolymer.

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Abstract

The invention discloses a preparation method of functionalized polypropylene copolymer. In the method, an imidazole-based cobalt catalyst is adopted, and the copolymer is obtained by the copolymerization of propylene and polar monomers which are catalyzed by the catalyst in the presence of propylene. The density and quantity of the polar functional groups of the polypropylene copolymer can be adjusted. The copolymer maintains the good characteristics of polypropylene such as the original high melting point and high crystallinity.

Description

technical field [0001] The invention relates to a preparation method of functionalized polypropylene copolymer. Background technique [0002] As a large variety of general-purpose plastics, polypropylene has been widely used in daily life, packaging industry, automobile, construction, agriculture and military fields because of its excellent mechanical properties, good processing performance, strong electrical insulation, stable chemical properties and low price. Wide range of applications. However, since polypropylene is a non-polar polymer with very low surface energy, it is difficult to achieve effective bonding and compatibility at the interface when it is blended or compounded with most other polymers or inorganic materials. The performance of blends or composites is difficult to guarantee, which limits the application of polypropylene in dyeing, printing and bonding. Functionalized polypropylene is to introduce polar functional groups into the polypropylene chain, inc...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F216/04C08F4/70C07F15/06
CPCC07F15/065C08F4/7006C08F210/06C08F216/04
Inventor 曹晨刚
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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