Method for preparing organophosphorus sensitive polymer material by introducing hexafluoroisopropanol functional group into polymer

A hexafluoroisopropanol functional, polymer material technology, applied in the field of gas-sensitive polymer materials, can solve problems such as threats to the life and health of operators, inability to observe the process of the reaction, and potential safety hazards.

Active Publication Date: 2010-11-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

More importantly, during the transfer process, the liquefied hexafluoroacetone will vaporize and leak into the environment, seriously polluting the environment and threatening the life and health of operators.
In addition, the use of an autoclave is another safety hazard; moreover, the reaction is carried out in an autoclave, and the progress of the reaction cannot be observed

Method used

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  • Method for preparing organophosphorus sensitive polymer material by introducing hexafluoroisopropanol functional group into polymer
  • Method for preparing organophosphorus sensitive polymer material by introducing hexafluoroisopropanol functional group into polymer
  • Method for preparing organophosphorus sensitive polymer material by introducing hexafluoroisopropanol functional group into polymer

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0032] In this example, what is synthesized is a linear polysiloxane with hexafluoroisopropanol substituent at the end group, its structure is as follows image 3 As shown, the synthesis mechanism can be expressed as:

[0033]

[0034] Among them, n is an integer of 200-500, R 1 and R 3 is trimethylsilane, R 2 For methyl, its preparation method is as follows:

[0035] Under the protection of nitrogen, place 0.01mol of the above-mentioned polysiloxane polymer intermediate in a three-necked bottle equipped with a thermometer and a reflux condenser, and titrate the hexafluoroacetone hydrate produced by concentrated sulfuric acid. After the concentrated sulfuric acid washing solution is treated, it is passed into the reactor for gas-liquid reaction. After the dropwise addition, it is heated to 120°C, stirred and refluxed for 26-28 hours. When the reaction solution turns khaki, stop the reaction and cool To room temperature, purging the reactor repeatedly with nitrogen, so t...

specific Embodiment approach 2

[0036] In this example, what is synthesized is a kind of hyperbranched polycarbosilane whose terminal group contains hexafluoroisopropanol substituent, its structure is as follows Figure 5 As shown, the synthesis mechanism can be expressed as:

[0037]

[0038] The specific preparation method is:

[0039] Under nitrogen protection, place 0.01mol of the above-mentioned three-branched carbosilane hyperbranched polymer intermediate in a three-necked bottle equipped with a thermometer and a reflux condenser, and hexafluoroacetone gas produced by titrating hexafluoroacetone hydrate with concentrated sulfuric acid, After being treated with concentrated sulfuric acid washing solution, it is passed into the reactor for gas-liquid reaction. After the dropwise addition, it is heated to 110°C, stirred and refluxed for 32 hours. When the reaction solution turns light brown, stop the reaction and cool it. To room temperature, purging the reactor repeatedly with nitrogen, so that the hex...

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Abstract

The invention discloses a method for preparing an organophosphorus sensitive polymer material by introducing a hexafluoroisopropanol functional group into polymer. A hexafluoroacetone hydrate which has low toxicity and is liquid at normal temperature is taken as a raw material, and is subjected to dehydration and titration to generate hexafluoroacetone gas, and then the hexafluoroacetone gas and a polymer intermediate undergo electrophilic addition reaction to prepare the organophosphorus sensitive polymer material. The preparation method has the advantages of simpleness, easy operation, mild reaction conditions, low requirement on experimental equipment, low cost of the material, and low toxicity of the material, and is a simple, convenient, practical and high-efficiency preparation method by introducing a hexafluoroisopropanol substituent group to a terminal group of the polymer.

Description

technical field [0001] The invention relates to the technical field of gas-sensitive polymer materials, in particular to a method for preparing organophosphorus-sensitive polymer materials by introducing hexafluoroisopropanol functional groups into polymers. Background technique [0002] Organophosphorus compounds are a class of neuroinhibitory compounds that can act on acetylcholinesterase in organisms to inactivate them, leading to serious dysfunction of the central nervous system and peripheral choline nervous system. They have strong lethality, fast action speed, and It is difficult to protect, so it is widely used in pesticides and chemical weapons. The detection and analysis of organophosphorus toxic substances has always been a research hotspot in the field of environmental monitoring and chemical defense in various countries in the world. Among the various technologies suitable for on-site detection, surface acoustic wave sensor technology has attracted the most att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/385C08G77/60
Inventor 杜晓松黄嘉蒋亚东王晓杰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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