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Method for preparing cross-linked polymer

A technology of cross-linked polymers and polymers, applied in the field of polymer materials, can solve the problems of not conforming to the general direction of environmental friendliness and high energy consumption, and achieve the effect of low pressure, simple method and good repeatability

Active Publication Date: 2008-06-04
江苏君澄空间科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the above three methods all need to be heated and reacted at high temperature, so the energy consumption of the whole process is very high, which is not in line with the current general direction of emphasizing environmental friendliness

Method used

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  • Method for preparing cross-linked polymer
  • Method for preparing cross-linked polymer
  • Method for preparing cross-linked polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment one: CuCl (1.4mg, 0.015mmol), PMDETA (7.7mg, 0.044mmol), DMAEMA (5ml, 0.03mol) and deionized water (20ml) are added in a beaker, and utilize water bath to make its reaction temperature Control at 30°C. After 24 hours, put the polymer solution in a 70°C water bath. After the polymer precipitates, take it out and put it in deionized water at room temperature, and then transfer it to a 70°C water bath. Repeat the treatment three times. As above, the filtered polymer was dried in an oven at 45° C. for 2 days to obtain a white or light yellow product weighing about 1.3 grams. The water absorption ratio in deionized water measured by the saturated swelling method is 26.6.

Embodiment 2

[0016] Embodiment two: CuCl (2.9mg, 0.029mmol), PMDETA (15.3mg, 0.088mmol), DMAEMA (10ml, 0.059mol) and deionized water (23.3ml) are added in a beaker, and utilize water bath to make it react The temperature is controlled at 30°C. After 24 hours, put the polymer solution in a 70°C water bath. After the polymer precipitates, take it out and put it in deionized water at room temperature, then transfer it to a 70°C water bath, and repeat the process. More than three times, the filtered polymer was dried in an oven at 45°C for 3 days to obtain a white or light yellow product weighing about 2.2 grams. The water absorption ratio in deionized water measured by the saturated swelling method is 37.9.

Embodiment 3

[0017] Embodiment three: CuCl (4.4mg, 0.044mmol), PMDETA (22.9mg, 0.13mmol), DMAEMA (15ml, 0.088mol) and deionized water (22.5ml) are added in a beaker, and utilize water bath to make it react The temperature is controlled at 30°C. After 24 hours, put the polymer solution in a 70°C water bath. After the polymer precipitates, take it out and put it in deionized water at room temperature, then transfer it to a 70°C water bath, and repeat the process. More than three times, the filtered polymer was dried in an oven at 45°C for 3 days to obtain a white or light yellow product weighing about 3.7 grams. The water absorption ratio in deionized water measured by the saturated swelling method is 24.7.

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Abstract

The invention relates to a method of producing crosslinked high polymer by oxidative polymerization. Water or other diluents are added or not added into dimethyl aminoethyl methacrylate, a certain amount of CuX(X=Cl or Br) and pentamethyldiethylenetriamine are added, and then being exposed in air. 24 hours later, the system becomes viscous and finally the crosslinked polymer is obtained. The polymer can absorb deionized water 2-40 times of dead weight. Compared with the traditional method, the method disclosed by the invention is simple and has good repeatability.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to the preparation of hydrophilic cross-linked polymers. Background technique [0002] According to the structure of polymer chains, polymer compounds can be divided into three categories: linear, branched and cross-linked. Typical representatives of these three types of polymers in the general polymer material industry are polypropylene, high impact polystyrene and rubber materials. Specific to hydrophilic polymers that are more used as functional materials, common polyacrylic acid thickeners, polyacrylamides, etc. are typical linear polymers, while branched hydrophilic polymers are rare. Superabsorbent resins are typical cross-linked polymers. Certain highly hydrophilic polymers with a cross-linked structure can absorb dozens or even hundreds of times their own weight in deionized water to become hydrogels. Such materials can be used as water-absorbing resins, urine-absorbing mater...

Claims

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Application Information

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IPC IPC(8): C08F220/34
Inventor 翟光群展燕倪灿艳夏有贵陈华峰
Owner 江苏君澄空间科技有限公司
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