Catalyst for copolymerization of carbon dioxide and epoxy compounds, preparation method and applications thereof

A technology of epoxy compounds and carbon dioxide, applied in the direction of cobalt organic compounds, etc., can solve the problems of high synthesis cost, cumbersome preparation steps, and many raw materials, and achieve the effect of simple preparation steps, low cost, and reduced equipment investment

Inactive Publication Date: 2009-10-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the functional complex has good activity, its preparation steps are cumbersome and the raw materials are various, resulting in high syn

Method used

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  • Catalyst for copolymerization of carbon dioxide and epoxy compounds, preparation method and applications thereof
  • Catalyst for copolymerization of carbon dioxide and epoxy compounds, preparation method and applications thereof
  • Catalyst for copolymerization of carbon dioxide and epoxy compounds, preparation method and applications thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: (ligand II 1 synthesis)

[0027] Under argon atmosphere, add 0.0018mol 3-tert-butyl-5-(methylene-N-tetrahydropyrrolyl) salicylaldehyde (III 1 ) and 0.0009mol cyclohexanediamine, add ethanol to two kinds of substances and completely dissolve, reflux reaction 12 hours under stirring, be down to room temperature, be concentrated to the constant quality of crude product under the vacuum degree of 0.1MPa, concentrate column chromatography (SiO 2 , petroleum ether / ethyl acetate, V / V=1:1), the second component was collected, concentrated to a constant mass under a vacuum of 0.1MPa, dissolved and filtered with petroleum ether, and the filtrate was concentrated at room temperature under a vacuum of 0.1MPa To a constant mass, the ligand II 1 , yield 64%.

Embodiment 2

[0028] Embodiment 2: (II 2 )

[0029] With 3-tert-butyl-5-(methylene-N-hexahydropyridyl) salicylaldehyde (III 2 ) (0.0018mol) instead of 3-tert-butyl-5-(methylene-N-tetrahydropyrrolyl) salicylaldehyde (III 1 ), operation is with embodiment 1, gets II 2 , yield 91%.

Embodiment 3

[0030] Embodiment 3: (II 3 )

[0031] With 3-tert-butyl-5-(methylene-N-morpholino) salicylaldehyde (III 3 ) (0.0018mol) instead of 3-tert-butyl-5-(methylene-N-tetrahydropyrrolyl) salicylaldehyde (III 1 ), operation is with embodiment 1, gets II 3 , yield 87.7%.

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Abstract

The invention relates to a catalyst for copolymerization of carbon dioxide and epoxy compounds, a preparation method and applications thereof. The structural formula of the catalyst is compound (I) at the right side, wherein X refers to halogen, nitrate radical, azide group or trifluoroacetic acid group; R1 is 1, 2-site disubstituted cyclohexyl or 1, 2-site disubstituted 1, 2-diphenyl-ethyl; R2 is N substituted pyrrolidine, piperidyl, morpholinyl, dibutylamine or 4- methylamino-pyridyl; R3 is tert-butyl group. The preparation method of the catalyst for the copolymerization of carbon dioxide and epoxy compounds comprises the two preparation steps of a ligand and the catalyst. The catalyst preparation method has simple preparation steps, low cost and good catalysis efficiency and product selectivity. Under the noumenon polymenrism or the solution polymenrism, the carbon dioxide and epoxy compounds are polymerized under the lower polymenrism of carbon dioxide (optimal pressure is 30 atm) and simultaneously the copolymer with the content of the polycarbonate unit of more than 98% and the catalyst with the catalytic efficiency of 60-214g polymer/g are obtained.

Description

Technical field: [0001] The invention relates to the polymerization of carbon dioxide and epoxy compounds, in particular to a catalyst for the copolymerization of carbon dioxide and epoxy compounds and its preparation method and application. Background technique: [0002] carbon dioxide (CO 2 ) is the main gas that causes the "greenhouse effect", but it is also one of the carbon resources with the largest reserves on the earth. Its reserves on the earth are more than the sum of natural gas, oil and coal. In view of the harm of carbon dioxide gas to the environment, human beings have been exploring scientific ways to use carbon dioxide to 2 The synthesis of polymer materials as comonomers is one of the technologies that have attracted people's attention. Among them, using CO 2 Aliphatic polycarbonate copolymerized with epoxy compounds has good gas barrier properties, transparency and biodegradability, and has broad application prospects in the fields of disposable packagin...

Claims

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Application Information

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IPC IPC(8): C08G64/34C07F15/06
Inventor 刘宾元赵鑫高延浩张莉曲佳燕杨敏
Owner HEBEI UNIV OF TECH
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