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Polythiourea compound as well as preparation method and application thereof

An amine compound and compound technology, applied in the fields of polymer chemistry and materials science, can solve the problems of complex separation and purification process, high energy consumption, unfavorable development of polythiourea, etc., and achieve strong tolerance, high polymerization efficiency, Inexpensive effect

Active Publication Date: 2021-11-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thiourea used in these methods needs to be reacted under microwave conditions, which requires high energy consumption, while thiophosgene is a highly toxic gas and is unstable when exposed to water. Diisothiocyanate needs to be synthesized by diamine, and the separation and purification process is complicated.
These factors are not conducive to the development of structurally and functionally novel polythiourea

Method used

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  • Polythiourea compound as well as preparation method and application thereof
  • Polythiourea compound as well as preparation method and application thereof
  • Polythiourea compound as well as preparation method and application thereof

Examples

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preparation example Construction

[0035] The invention provides a kind of preparation method of polythiourea compound, comprises the following steps:

[0036] (1) Under a protective gas, mix amine compounds, elemental sulfur and triphenylphosphine difluoroacetic acid inner salt, add an organic solvent to obtain a mixed solution, heat up and stir at this temperature to carry out polymerization;

[0037] (2) After the reaction in step (1) is complete, the reaction system is cooled, the reaction mother liquor is dissolved in an organic solvent, and then added to a precipitant for precipitation, and the precipitate is collected and dried to a constant weight to obtain polythiourea class of compounds.

[0038] Amine compounds in the present invention include diamines and polyamines.

[0039] In the present invention, when the preferred amine compound is a polyamine compound, the molar ratio of polyamine compound: elemental sulfur: triphenylphosphine difluoroacetic acid inner salt is 1:2-10:1-4.

[0040] In the pr...

Embodiment 1

[0057] A polythiourea compound, its structural formula is shown in P1:

[0058]

[0059]The polythiourea compound is prepared by direct reaction of triphenylphosphine difluoroacetic acid inner salt, elemental sulfur and diamine, and the reaction formula is as formula (1):

[0060]

[0061] Wherein, the monomer M1 is 1,4-diaminodiphenylmethane, which can be purchased from the market, in this example, from Anaiji Company; M is sublimed sulfur, which can be purchased from the market, and in this example, it was purchased from Aladdin Company; M0 is the internal salt of triphenylphosphine difluoroacetic acid, which can be purchased from the market, and in this example, it was purchased from Shangfu Technology Co., Ltd.

[0062] The synthesis steps of the described polythiourea are as follows: monomer M1, monomer M, and monomer M0 are sequentially added into the polymerization tube according to the molar ratio of 1:4:2, and the concentration of injecting dimethyl sulfoxide to...

Embodiment 2

[0068] A polythiourea compound, its structural formula is shown in P2:

[0069]

[0070] The polythiourea compound is prepared by direct reaction of triphenylphosphine difluoroacetic acid inner salt, elemental sulfur and diamine, and the reaction formula is as formula (2):

[0071]

[0072] Wherein, the monomer M2 is 1,4-diaminodiphenyl ether, which can be purchased from the market, in this example, from Anaiji Company; M is sublimed sulfur, which can be purchased from the market, and in this example, it was purchased from Aladdin Company; M0 is the internal salt of triphenylphosphine difluoroacetic acid, which can be purchased from the market, and in this example, it was purchased from Shangfluorine Technology Co., Ltd.

[0073] The synthesis steps of the polythiourea are as follows: monomer M2, monomer M, and monomer M0 are sequentially added into the polymerization tube according to the molar ratio of 1:2:1, and dimethyl sulfoxide is injected until the concentration o...

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Abstract

The invention belongs to the field of polymer chemistry and material science, and particularly relates to a polythiourea compound as well as a preparation method and application thereof. The preparation method of the polythiourea compound comprises the following steps of: (1) under protective gas, mixing an amine compound, elemental sulfur and triphenylphosphine difluoroacetic acid inner salt, adding an organic solvent, heating, keeping the temperature, and carrying out a polymerization reaction under stirring; and (2) after the reaction in the step (1) is completed, cooling the reaction system to room temperature, dissolving a reaction mother solution in an organic solvent, then adding the solution into a precipitant for precipitation, collecting a precipitate, and drying the precipitate at room temperature to constant weight to obtain the polythiourea compound. The preparation method has the advantages of easily available reaction raw materials, mild polymerization conditions, simple process and high polymerization efficiency. The polythiourea compound can be used for high refractive index films or optical devices.

Description

technical field [0001] The invention belongs to the field of polymer chemistry and material science, and in particular relates to a polythiourea compound and its preparation method and application. Background technique [0002] Polythiourea is a typical sulfur-containing polymer, which has special advantages such as excellent self-healing properties, high refractive index, high dielectric constant, and strong metal coordination ability, and has attracted widespread attention from scientists. The reported method of synthesizing polythiourea is mainly prepared by reacting diamine monomer with thiourea, thiophosgene, diisothiocyanate and the like. The thiourea used in these methods needs to be reacted under microwave conditions, which requires high energy consumption, while thiophosgene is a highly toxic gas and is unstable when exposed to water. Diisothiocyanate needs to be synthesized by diamine, and the separation and purification process is complicated. . These factors ar...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08J5/18C08L79/02
CPCC08G73/02C08J5/18C08J2379/02
Inventor 唐本忠胡蓉蓉于永江秦安军赵祖金
Owner SOUTH CHINA UNIV OF TECH
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