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Photo polymerization method of trielement copoly water soluble polymer reversed phase microemulsion using acrylamide as maia body

A technology of water-soluble polymer and inverse microemulsion, which is applied in the field of photopolymerization of ternary copolymerization water-soluble polymer inverse microemulsion, which can solve the problem of long reaction time, easy fluctuation of polymerization temperature, difficulty in controlling the molecular weight distribution of polymerization products, etc. problem, to achieve the effect of fast reaction speed, narrow molecular weight distribution and good water solubility

Active Publication Date: 2005-05-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a lot of research work has been done on acrylamide microemulsion polymerization and some achievements have been made, due to the complexity of microemulsion polymerization and the variability of polymer requirements, there are still a lot of problems to be solved in microemulsion polymerization
So far, microemulsion polymerization is generally carried out by thermal polymerization, the reaction time is relatively long, the polymerization temperature is easy to fluctuate, and the molecular weight distribution of the polymerization product is difficult to control, etc. These are all problems that need to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 15 grams of acrylamide, 3 grams of acrylic acid, 2 grams of hydroxyethyl methacrylate, and 20 grams of deionized water, and fully dissolve them in the reactor. Then weigh 58 grams of Span-80, 30 grams of Tween-60, and 45 grams of kerosene and stir them fully in the reactor to obtain a transparent or translucent microemulsion. Dissolve 0.06 g (total monomer weight 0.3%) benzoin dimethyl ether with 1 g of toluene, add it to the microemulsion, then place the reactor in an ice-water bath, pass nitrogen to deoxygenate for 40 minutes, and then perform ultrasonic treatment in an ultrasonic pool 5 minutes. The reactor was placed in an ice-water bath, and irradiated with an ultraviolet lamp (a 1000-watt high-pressure mercury lamp, with a distance of 15 cm between the lamp and the reactor) for 18 minutes, and the polymerization reaction was completed. The reaction system should still be in the form of transparent or translucent microemulsion. After diluting the reactants ...

Embodiment 2

[0034] Acrylamide 36g

[0035] Methacrylic acid 8.5g

[0036] N-vinylpyrrolidone 7.2g

[0037] Deionized water 50g

[0038] Span-85 150g

[0039] Tween-65 90g

[0040]White oil 120g

[0041] Adopt the above ratio to prepare microemulsion by the method of Example 1, then add the initiator azobisisobutyronitrile of 0.03% of the total monomer weight of benzene dissolution, polymerize by the method of Example 1, use 120g white oil after polymerization Diluted, and the same treatment method as in Example 1 can be used to obtain the pure product of the terpolymer mainly composed of acrylamide.

[0042] The particle diameter, intrinsic viscosity number, molecular weight of the copolymer microemulsion synthesized by above embodiment are listed in Table 1.

Embodiment 3

[0044] Acrylamide 33g

[0045] N-methacrylamide 5g

[0046] Methacryloyloxyethyltrimethylammonium chloride 3g

[0047] Deionized water 43g

[0048] Span-40 120g

[0049] Tween-81 65g

[0050] Naphtha 95g

[0051] Phosphorus benzophenone photoinitiator 0.12g

[0052] Toluene 2g

[0053] Using the above proportions, polymerize according to the method of Example 1, dilute with 95g of naphtha after polymerization, and follow the same treatment method as in Example 1 to obtain a terpolymer mainly composed of acrylamide.

[0054] The particle diameter, intrinsic viscosity number, molecular weight of the copolymer microemulsion synthesized by above embodiment are listed in Table 1.

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Abstract

A photopolymerizing process for preparing the three elements copolymerized water-soluble high-molecular reverse-phase microemulsion includes proportionally mixing acrylamide as primary element with ether two water-soluble monomers to obtain an aqueous solution, and photopolymerizing. Its advantages are high polymerizing speed and performance, and high polymerizing conversion percentage.

Description

technical field [0001] The invention belongs to the technical field of water-soluble polymer synthesis, and in particular relates to a photopolymerization method of a ternary copolymerized water-soluble polymer inverse microemulsion with acrylamide as the main body. Background technique [0002] At present, polyacrylamide and its copolymers have become an important class of chemical products, which are widely used in various fields such as textiles, printing and dyeing, coatings, construction and water treatment, especially as oil field water plugging and profile control agents, which play a very important role. meaning. Polyacrylamide and its copolymers commonly used in oil fields generally have two different forms, namely solution polymer and dry powder polymer. The solid content of solution acrylamide polymer is low, generally only about 8% to 10%, which is very inconvenient for packaging, storage, transportation, and construction; while the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/00C08F4/00C08F220/56
Inventor 张云龙吴飞鹏李妙贞王尔鑑
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI