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Preparation method of hyperbranched polysiloxane with controllable amino content

A technology of polysiloxane and content, applied in the field of synthesis of hyperbranched polymers, can solve the problems of high cost and limited scope, and achieve the effect of expanding the scope and reducing the production cost.

Active Publication Date: 2013-02-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the range of monomers used for synthesizing hyperbranched polysiloxane is limited, and the cost is relatively high

Method used

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  • Preparation method of hyperbranched polysiloxane with controllable amino content
  • Preparation method of hyperbranched polysiloxane with controllable amino content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 16.15g DMAc, 15.2220g (0.1mol) TMOS, 7.2132g (0.06mol) dimethyldimethoxysilane, 1.7937g (0.01mol) 3-amino to the container equipped with an electric stirrer in sequence propyltrimethoxysilane, start stirring at the same time, and maintain the temperature of the system at -5~5℃;

[0026] (2) Calculate the molar ratio, slowly add 3.67g of distilled water to the system (1), stir and react at a constant temperature of -5~5°C for 1~2h, then raise the temperature to 60°C and continue stirring Reaction for 2h to obtain solution A;

[0027] (3) The solution A was evacuated for 2 to 3 hours at a temperature of 65-70 °C and a pressure of -0.075 MPa to remove the alcohol generated by the reaction to obtain a hyperbranched polysiloxane with an amino group content of 0.49 mmol / g.

Embodiment 2

[0029] (1) 20.17g DMAc, 20.8330g (0.1mol) TEOS, 7.2132g (0.06mol) dimethyldimethoxysilane, 2.2137g (0.01mol) KH550 were sequentially added to the container equipped with an electric stirrer, and simultaneously Start stirring and maintain the system temperature at -5~5℃;

[0030] (2) Calculate the molar ratio, slowly add 3.67g of distilled water to the system (1), stir and react at a constant temperature of -5~5°C for 1~2h, then raise the temperature to 60°C and continue stirring Reaction for 2h to obtain solution A;

[0031] (3) The solution A was evacuated for 2 to 3 hours at a temperature of 65 to 70 °C and a pressure of -0.075 MPa to remove the alcohol generated by the reaction to obtain a hyperbranched polysiloxane with an amino group content of 0.59 mmol / g.

Embodiment 3

[0033] (1) 18.39g DMAc, 20.8330g (0.1mol) TEOS, 8.8932g (0.06mol) dimethyldiethoxysilane, 4.4274g (0.02mol) KH550 were sequentially added to a container equipped with an electric stirrer, and simultaneously Start stirring and maintain the system temperature at -5~5℃;

[0034] (2) Calculate the molar ratio, slowly add 3.56g of distilled water to the system (1), stir and react at a constant temperature of -5~5°C for 1~2h, then raise the temperature to 60°C and continue stirring Reaction for 2h to obtain solution A;

[0035] (3) The solution A was evacuated for 2 to 3 hours at a temperature of 65 to 70 °C and a pressure of -0.075 MPa to remove the alcohol generated by the reaction to obtain a hyperbranched polysiloxane with an amino group content of 1.11 mmol / g.

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Abstract

The invention relates to a preparation method of hyperbranched polysiloxane with controllable amino content. According to the invention, a tetrafunctional silane monomer, a difunctional silane monomer, and a trifunctional silane monomer containing amino group are subjected to a hydrolytic condensation reaction in a high-polarity aprotic solvent; vacuum pumping is carried out, such that alcohol produced through the reaction is removed, and hyperbranched polysiloxane with different amino contents can be obtained. The amino-containing hyperbranched polysiloxane synthesis has mild reaction conditions and easy-to-control hydrolysis processes. Controllability of amino content is structurally realized, production cost is reduced, product structure and molecular weight can be controlled, and the scope of monomers for synthesizing is enlarged. Therefore, a novel application prospect is developed for wide application of the hyperbranched polymer in emerging fields.

Description

technical field [0001] The invention belongs to the field of synthesis of hyperbranched polymers, in particular to a preparation method of hyperbranched polysiloxane with controllable amino content. Background technique [0002] As early as 1952, Flory proposed the concept of hyperbranched polymers, and theoretically demonstrated AB x The possibility of preparing hyperbranched polymers by intermolecular polycondensation of (x≥2) monomers was compared with linear polymers and cross-linked polymers. However, due to the poor mechanical properties of hyperbranched polymers, it failed to attract enough attention. [0003] Hyperbranched polymers are macromolecules with a highly branched three-dimensional spherical structure with a large number of end groups, due to the advantages of no chain entanglement between molecules and high solubility, low viscosity, high chemical reactivity and good biocompatibility. It has received more and more attention, and now it has demonstrated at...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08G77/06
Inventor 张秋禹雷星锋张和鹏厉向杰张宝亮陈营
Owner NORTHWESTERN POLYTECHNICAL UNIV
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