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Polyethylene graft copolymer and its preparation method

A polyethylene graft and copolymer technology, applied in the field of polyethylene graft copolymers, can solve the problems of harsh reaction conditions, complex synthesis methods, and unstable structures

Inactive Publication Date: 2007-03-14
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the existing synthetic method that polyethylene copolymer is converted into atom transfer radical polymerization initiator is too complicated, and reaction condition is harsh, and yield is very low; Or gained copolymer branch and main chain are connected by C-O bond, so structure not stable enough
Moreover, it is difficult to precisely control the grafting density and grafting quantity of functionalized functional groups in functionalized polyolefin graft copolymers.

Method used

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  • Polyethylene graft copolymer and its preparation method
  • Polyethylene graft copolymer and its preparation method
  • Polyethylene graft copolymer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take a 500ml reactor, add 100ml hexane, add 0.1mmol methylaluminoxane toluene solution, add 0.1g divinylbenzene, add 0.1μmol racemic-ethylene-bis(1-indenyl)-ZrCl under stirring 2catalyst. Ethylene gas was introduced at 50°C, and the reaction was carried out at 5 atmospheres for 1 hour to obtain 19 g of a polymer. 1 H-NMR characterization determines that the content of styrene units in the copolymer is 0.1%, 1 See accompanying drawing 1 for H-NMR spectrogram.

Embodiment 2

[0038] Take a 500mL reactor, add 100ml pentane, add 0.01mmol ethylaluminoxane toluene solution, add 10g vinyl styrene, add 0.1μmol racemic-isopropylidene-bis(1-indenyl) under stirring )-ZrCl 2 catalyst. Ethylene gas was introduced at 0°C, and the reaction was carried out at 1 atmosphere for 100 hours to obtain 16.7 g of a polymer. 1 H-NMR characterization confirmed that the content of styrene derivatives in the copolymer was 30%.

Embodiment 3

[0040] Take a 500mL reactor, add 100ml of toluene, add 0.001mmol of methylaluminoxane in toluene, add 3 grams of hexenylstyrene, add 0.01μmol of rac-dimethylsilyl-bis(1-indene) under stirring base)-ZrCl 2 catalyst. Ethylene gas was introduced at 100°C, and the reaction was carried out at 10 atmospheres for 10 hours to obtain 8.8 g of a polymer. 1 H-NMR characterization confirmed that the content of styrene derivatives in the copolymer was 10%.

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Abstract

The present invention is one kind of graft polyethylene copolymer prepared through polymerization initiated with one kind of atom transferring free radical polymer initiator and under mild condition. The preparation process includes copolymerization in the presence of homogeneous catalyst system including metallocene catalyst and subsequent addition in simple condition and has yield near 100 %. The present invention has graft density and number of functional groups capable of being regulated precisely. The graft polyethylene copolymer has high smelting point, high crystallization degree and other excellent performance of polyethylene maintained.

Description

technical field [0001] The present invention relates to a polyethylene graft copolymer. [0002] The present invention also relates to a process for the preparation of the above-mentioned copolymers. Background technique [0003] As a large variety of general-purpose plastics, polyethylene has been widely used in daily life, packaging industry, automobile, construction, agriculture and military because of its excellent mechanical properties, good processing performance, strong electrical insulation, stable chemical properties and low price. Wide range of applications. However, since polyethylene 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 composite materials is difficult to guarantee, which limits the application of polyethylene in the fields of dyeing, printing and bonding. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02
Inventor 董金勇曹晨刚
Owner INST OF CHEM CHINESE ACAD OF SCI