Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof

A technology of diazoacetate and ethoxycarbonyl carbene is applied in the field of diazoacetate and cyclic lactone copolymerization, can solve problems such as destruction, waste of resources and environment, and achieves simple and convenient method, simple and convenient preparation, and rapidity. Effects of Compositing Paths

Inactive Publication Date: 2013-03-20
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both carbene polymerization and ring-opening polymerization of cyclic lactones require the use of organometallic catalysts, resulting in waste of resources and damage to the environment.

Method used

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  • Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof
  • Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof
  • Terpolymer of diazoacetate, carbethoxy cabbeen and cyclic lactone and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Under the protection of argon, 0.0001 mol of benzyl alcohol as an initiator, 0.01 mol of ethyl diazoacetate and 0.01 mol of ε-caprolactone were irradiated by 200 watts of microwave for 120 minutes. The resulting product was reprecipitated from tetrahydrofuran / methanol. Removal of the organic solvent in vacuo yields the polymer. The molecular weight of the obtained polymer was 36100, the yield was 24.61%, and the nitrogen content was 1.38%.

Embodiment 2

[0030] Under the protection of argon, 0.0001 mol of benzyl alcohol as an initiator, 0.01 mol of ethyl diazoacetate and 0.01 mol of δ-valerolactone were irradiated by 200 watts of microwave for 120 minutes. The resulting product was reprecipitated from tetrahydrofuran / methanol. Removal of the organic solvent in vacuo yields the polymer. The molecular weight of the obtained polymer was 1500, the yield was 29.45%, and the nitrogen content was 4.17%.

Embodiment 3

[0032] Under nitrogen protection, 0.0001 mol of benzyl alcohol was used as an initiator, 0.01 mol of ethyl diazoacetate and 0.01 mol of γ-butyrolactone were irradiated by 200 watts of microwave for 300 minutes. The resulting product was reprecipitated from tetrahydrofuran / methanol. Removal of the organic solvent in vacuo yields the polymer. The molecular weight of the obtained polymer was 2100, the yield was 26.20%, and the nitrogen content was 5.54%.

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Abstract

The invention discloses a method for copolymerizing diazoacetate and cyclic lactone. The specific preparation method comprises the following steps of: reacting the diazoacetate and the cyclic lactone as monomers for a period of time under microwave irradiation in the presence of an initiator and under the condition of inert gas protection, thereby obtaining the polymer. The method is free of catalyst and solvent, simple and convenient to prepare, easy in parameter control and fast in reaction, and the prepared polymer is large in molecular weight and a brand new path is provided for the copolymerization reaction of the cyclic lactone and free radicals. The polymer prepared by the method provided by the invention is expected to be widely applied to fields of rubber, plastics and the like.

Description

technical field [0001] The invention relates to a method for copolymerization of diazoacetate and cyclic lactone. Background technique [0002] The polymerization reaction using diazonium salt as monomer and removing nitrogen gas is called carbene polymerization. This reaction is a type of reaction to obtain a polymer with a new structure based on an organometallic catalyst. During the reaction, the organometallic catalyst and the diazonium salt monomer form a complex to promote the departure of nitrogen and the generation of metal carbene intermediates. The characteristic of this reaction is that a polymer with a new structure is obtained. On the main chain, each carbon atom can be connected with a modification group. The ring-opening polymerization of cyclic lactones under microwave irradiation (Microwaves) is a common polymerization reaction, and its advantages are: fast reaction, high molecular weight of the obtained polymer, and low dispersion coefficient. However, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/00C08G63/685
Inventor 刘立建肖龙强郭鑫
Owner WUHAN UNIV
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