Carbonyl terminated hyperbranched polycarbonate capable of emitting bright fluorescence and preparation method thereof

A technology of polycarbonate and hydroxyl-terminated hyperbranching, which is applied in the field of hyperbranched polycarbonate and its preparation, can solve the problems of phosgene being highly toxic, hydrogen chloride is highly irritating, and environmental pollution, and achieves low cytotoxicity and less pollution from three wastes. , the effect of a wide range of applications

Inactive Publication Date: 2017-09-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phosgene is highly toxic, and the by-product is hydrogen chloride, which is also highly irritating and pollutes the environment.

Method used

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  • Carbonyl terminated hyperbranched polycarbonate capable of emitting bright fluorescence and preparation method thereof
  • Carbonyl terminated hyperbranched polycarbonate capable of emitting bright fluorescence and preparation method thereof
  • Carbonyl terminated hyperbranched polycarbonate capable of emitting bright fluorescence and preparation method thereof

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Effect test

example 1

[0034] The first step, the preparation method of hydroxyl-terminated hyperbranched polycarbonate: under the protection of nitrogen, diethyl carbonate (0.126mol) and glycerol (0.151mol) are in a molar ratio of 1:1.2, heated and stirred at 90°C After 20 minutes, a catalyst, p-toluenesulfonic acid (0.29 g, accounting for 1% of the total mass of reactants), was added to gradually raise the temperature to 110° C., and reacted for 4 hours. Distill under reduced pressure to remove unreacted diethyl carbonate and cool to room temperature. Then the product was dissolved in water, poured into a dialysis bag and dialyzed for 48 hours to remove unreacted glycerin, oligomers and catalysts, and the solution in the inner layer of the dialysis bag was rotary evaporated and vacuum-dried to obtain a hydroxyl-terminated hyperbranched polymer Carbonate 19.87g, yield 87.4%.

[0035] Second step, the preparation method of the hyperbranched polycarbonate of carbonyl termination: under nitrogen prot...

example 2

[0037] The first step, the preparation method of hydroxyl-terminated hyperbranched polycarbonate: under the protection of nitrogen, diethyl carbonate (0.126mol) and glycerol (0.162mol) are in a molar ratio of 1:1.29, heated and stirred at 90°C After 40 minutes, a catalyst, p-toluenesulfonic acid (0.16 g, 0.5% of the total mass of reactants) was added and the temperature was gradually raised to 150° C., and the reaction was carried out for 7 hours. Distill under reduced pressure to remove unreacted diethyl carbonate and cool to room temperature. Then the product was dissolved in water, poured into a dialysis bag and dialyzed for 48 hours to remove unreacted glycerin, oligomers and catalysts, and the solution in the inner layer of the dialysis bag was rotary evaporated and vacuum-dried to obtain a hydroxyl-terminated hyperbranched polymer Carbonate 19.13g, yield 84.2%.

[0038]The second step, the preparation method of carbonyl-terminated hyperbranched polycarbonate: under nitr...

example 3

[0040] The first step, the preparation method of hydroxyl-terminated hyperbranched polycarbonate: under the protection of nitrogen, diethyl carbonate (0.126mol) and glycerol (0.189mol) are in a molar ratio of 1:1.5, heated and stirred at 80°C After 50 minutes, the catalyst p-toluenesulfonic acid (0.26 g, 0.8% of the total mass of the reactants) was added and the temperature was gradually raised to 140° C., and the reaction was carried out for 8 hours. Distill under reduced pressure to remove unreacted diethyl carbonate and cool to room temperature. Then the product was dissolved in water, poured into a dialysis bag and dialyzed for 48 hours to remove unreacted glycerin, oligomers and catalysts, and the solution in the inner layer of the dialysis bag was rotary evaporated and vacuum-dried to obtain a hydroxyl-terminated hyperbranched polymer Carbonate 20.54g, yield 90.4%.

[0041] Second step, the preparation method of the hyperbranched polycarbonate of carbonyl termination: u...

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Abstract

The invention relates to carbonyl terminated hyperbranched polycarbonate capable of emitting bright fluorescence. Glycerol and diethyl carbonate are used as raw materials; a simple and controllable ester exchange condensation method is used for synthesizing the terminated hyperbranched polycarbonate; then, tert-Butyl acetoacetate is used for termination to obtain the hyperbranched polycarbonate. The synthesized hyperbranched polycarbonate does not contain pi keys such as benzene rings; the addition of fluorescent powder is not needed; the bright blue fluorescence can be given out; the characteristics of simple process, controllable process and low three-waste pollution are realized; in addition, the product stability is high; the toxicity is high; the biodegradability is high; the light intensity is high; the application range is wide.

Description

technical field [0001] The invention belongs to the field of polymer luminescent materials, and relates to a carbonyl-terminated hyperbranched polycarbonate capable of emitting bright fluorescence and a preparation method thereof. Background technique [0002] In recent years, as a new type of polymer, aliphatic polycarbonate has the advantages of environmental friendliness and good biocompatibility, and has been widely used in the fields of rubber, ceramics, coatings and drug sustained release. However, there are few reports about aliphatic polycarbonate as a fluorescent material. [0003] M. Tanimura et al. [Journal of Applied Polymer Science, 2010, 92: 468-473] discovered the fluorescence properties of aromatic polycarbonate, and the authors attributed the fluorescence to the chromogenic effect of the benzene ring. However, this kind of fluorescent polymers containing benzene rings will produce fluorescence quenching phenomenon due to the stacking of large π bonds when t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/42C08G64/30
CPCC08G64/305C08G64/42
Inventor 颜红侠黄为采德文白利华杜玉群原璐瑶
Owner NORTHWESTERN POLYTECHNICAL UNIV
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