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Method for preparing nucleus/shell type microemulsion fluid of copolymer in high inherent content

A technology with high solid content and copolymer, which is applied in the field of polymer synthesis, and can solve problems such as core/shell microemulsion copolymerization that have never been seen before.

Inactive Publication Date: 2005-11-16
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of the above reports are all reports of core / shell type emulsion polymerization, microemulsion polymerization or ultrasonic emulsification (micro) emulsion polymerization, but have never seen the copolymerization of core / shell type microemulsion under ultrasonic emulsification conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Note: All reaction raw materials need to undergo strict oxygen removal treatment when preparing solutions. The operation process is as follows:

[0016] 1. Prepare emulsifier solution and activator solution, and then place them in a 0-5°C water bath together with styrene from which the inhibitor has been removed to cool to a constant temperature;

[0017] 2. Take a 30ml pressure-resistant test tube and vacuumize;

[0018] 3. Inject the medicine into the test tube in sequence according to the order of emulsifier → activator → styrene → all oxidants;

[0019] 4. Place the test tube in an ultrasonic oscillator water bath (0-5°C) for 7.5 minutes of ultrasonic oscillation, and then react in a water bath of 0-5°C for 40 minutes;

[0020] 5. Add an appropriate amount of butadiene dissolved in n-dodecanethiol into the test tube, place it in an ultrasonic oscillator water bath (0-5°C) and oscillate for 7.5 minutes, then react in a water bath at 0-5°C 150 minutes;

[0...

Embodiment 2

[0024] Note: All reaction raw materials need to undergo strict oxygen removal treatment when preparing solutions.

[0025] The operation process is as follows:

[0026] 1. Prepare emulsifier solution and activator solution, and then place them in a water bath at 0-5°C to cool to a constant temperature together with toluene from which the polymerization inhibitor has been removed;

[0027] 2. Take a 30ml pressure-resistant test tube and vacuumize;

[0028] 3. Inject the medicine into the test tube in sequence according to the order of emulsifier → activator → styrene → all oxidants;

[0029] 4. Place the test tube in an ultrasonic oscillator water bath (0-5°C) for 7.5 minutes of ultrasonic oscillation, and then react in a water bath of 0-5°C for 80 minutes;

[0030] 5. Inject an appropriate amount of isoprene dissolved in n-dodecanethiol into the test tube, then place it in an ultrasonic oscillator water bath (0-5°C) for 7.5 minutes, and then place it in a water bath o...

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Abstract

A process for preparing the microemulsion of core-shell copolymer with high content of solid by ultrasonic emulsifying method features that the raw materials are sequentially added, that is, adding the monomer with low polymerizing competition power, vapor pressure and water solubility, adding trigger to polymerize core, and adding the second monomer to polymerize shell.

Description

Technical field: [0001] The present invention belongs to the field of macromolecule synthesis. Specifically, it adopts the mechanism of free radical polymerization, replaces traditional mechanical stirring with ultrasonic emulsification, and controls its feeding sequence according to the physical and chemical properties of comonomers, that is, adding reactivity ratio, vapor pressure and Comonomers with relatively small water solubility, at the same time, all initiators are added to the system at one time to polymerize for a period of time to form a core, and then the second comonomer is added for two-stage polymerization to form a shell to produce a core / shell type Preparation method of solid content copolymer microemulsion. Background technique: [0002] In the past two decades, due to the molecular designability of the core / shell structure and the excellent characteristics of the core / shell structure and microemulsion polymerization, more and more scientific researchers ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/56
Inventor 宗成中刘玉梅王春芙
Owner QINGDAO UNIV OF SCI & TECH
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