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Preparation method of water-dispersible polyacrylamide polymer

A technology of polyacrylamide and acrylamide, which is applied in the fields of sewage treatment, steel, sugar, papermaking, building materials, petrochemical, printing and dyeing, and can solve the problems of poor solubility, low dissolution rate, high viscosity of polymer solution, etc., and achieve production efficiency High, controllable structure, easy to control effect

Inactive Publication Date: 2019-08-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high-molecular-weight polymers have poor solubility in water, low dissolution rate, and high viscosity of polymer solutions. These shortcomings cause a lot of inconvenience and increase the cost of use.
In addition, the random copolymer of acrylamide and some functional monomers will reduce the utilization rate of functional monomers

Method used

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  • Preparation method of water-dispersible polyacrylamide polymer

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] 200 parts of water, 50 parts of acrylamide, 50 parts of methacryloxyethyltrimethylammonium chloride, 0.01 part of 3-benzylmercaptothiocarbonylpropionic acid, and 0.01 part of ammonium persulfate were added to a 100 mL three-necked flask. Mechanical stirring was carried out and nitrogen was blown for half an hour. The flask was immersed in an oil bath at 80°C to initiate polymerization, and the mechanical stirring speed was 200 revolutions per minute. During the polymerization process, the reaction was carried out under a nitrogen atmosphere for 2 hours before use. Take another 100mL three-necked flask, and add 250 parts of ammonium sulfate, 200 parts of acrylamide, 200 parts of water, and 500 parts of the synthesized polymer solution to continue the reaction. The reaction uses 5 parts of azodiisopropylimidazoline phosphate As an initiator to initiate polymerization. Polymerization was carried out at 50°C. After the reaction was carried out for 1 hour, 0.5 parts of N,N...

Embodiment 2

[0040] Add 200 parts of water, 0.5 parts of acrylamide, 1 part of N-isopropylacrylamide, and 0.005 parts of S-n-dodecyl-S'-(2-isobutyryl) trithiocarbonate into a 250 mL three-necked flask parts, 0.005 parts of azobisisobutylamidine hydrochloride. The mixed solution was stirred mechanically and deoxygenated with nitrogen for half an hour. The flask was immersed in an oil bath at 40°C to initiate polymerization, the mechanical stirring rate was 200 rpm, and the reaction was carried out under nitrogen atmosphere for 10 hours during the polymerization process. The obtained solution was evaporated to dryness, and the obtained polymer was collected for future use. Take another 250mL three-neck flask and add 1 part of water / ethanol (50% ethanol mass fraction) mixed solution, 0.1 part of acrylamide, 1 part of the synthesized polymer, 0.01 parts of redox-initiated ammonium persulfate and sodium bisulfite . The reaction was initiated at 45°C. At this time, 0.005 part of ethylene gly...

Embodiment 3

[0043] Add 0.5 part of acetic acid / water solution (5% acetic acid mass fraction), 0.1 part of sodium acrylate, 0.005 part of 2-(2-glycolic acid dithiocarbonylthio)propionic acid, and 0.005 part of ammonium persulfate into a 100 mL three-necked flask. Mechanical stirring was carried out and nitrogen was blown for half an hour. The flask was immersed in an oil bath at 60°C to initiate polymerization, the mechanical stirring rate was 200 revolutions per minute, and the polymerization process was carried out under a nitrogen atmosphere. After 2 hours of reaction, 2 parts of polyethylene glycol, 2 parts of water and 0.5 part of acrylamide were continuously added thereto, and the reaction was continued for 2 hours. Then, 0.01 part of N,N'-methylenebisacrylamide was dissolved in 1 part of acetone, and this was added three times at intervals of one hour. After the last addition, the reaction was continued for 1 hour, and the reaction ended.

[0044] In this example, a branched polya...

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Abstract

The invention discloses a preparation method of a water-dispersible polyacrylamide polymer, and belongs to the fields of sewage treatment, steel, petrochemistry, paper making, printing and dyeing, sugar making, building materials and the like. The method adopts a solution polymerization method and a semi-continuous dispersion polymerization method to prepare the polyacrylamide polymer dispersion liquid having special topological structures, and the particle diameter of the polyacrylamide polymer dispersion liquid is 10 nm to 50 [mu]m. The method provided by the invention can controllably introduce a branched structure, and finally prepares the acrylamide polymer aqueous-phase dispersion liquid having a plurality of topological structures such as block, star, hyperbranched, core-shell and microgel structures; and compared with a traditional aqueous phase dispersion polymerization method, the method provided by the invention has the advantages that the product structure can be regulatedand controlled without an additional stabilizing agent.

Description

technical field [0001] The invention belongs to the fields of sewage treatment, iron and steel, petrochemical, papermaking, printing and dyeing, sugar making, building materials, etc., and relates to a preparation method of water-dispersed polyacrylamide polymers, in particular to a method suitable for dispersion, adhesion, flocculation and A method for synthesizing an aqueous dispersion of an acrylamide polymer with rheology control and hyperbranched, core-shell and star structures. Background technique [0002] Acrylamide polymers are widely used in sewage treatment, steel, petrochemical, paper, printing and dyeing, sugar, building materials and other fields, including nonionic, cationic, anionic and amphiphilic polymers. [0003] Acrylamide polymers generally have three preparation methods: solution polymerization, inverse emulsion polymerization, and aqueous phase dispersion polymerization. During solution polymerization, due to the existence of a large number of hydrog...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/34C08F222/38
CPCC08F220/56C08F2438/03C08F220/34C08F222/385
Inventor 王文俊黄博刘平伟李伯耿
Owner ZHEJIANG UNIV
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