Hydrophobically associating polymer, preparation method and application thereof

A polymer and hydrophobic monomer technology, applied in the field of functional polymers, can solve the problems of difficult diffusion of polymerization heat, local overheating, uneven polymerization reaction, etc., achieve good solubility and viscosity-increasing performance, simple synthesis process, reproducible good sex effect

Inactive Publication Date: 2012-07-04
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional way of generating free radicals is mostly initiated by initiators, and it is an oxidation-reduction initiation system. The main disadvantages are that the polymerization reaction rate is difficult to control, the polymerization heat is not easy to diffuse, and it is prone to gelation effect and local overheating, resulting in uneven polymerization reaction. , the repeatability of the experimental results is poor, thus restricting the further improvement of the performance of hydrophobic association polymer products

Method used

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  • Hydrophobically associating polymer, preparation method and application thereof
  • Hydrophobically associating polymer, preparation method and application thereof
  • Hydrophobically associating polymer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, AM / NaAA / C 16 Synthesis of DMAAC Hydrophobically Associating Terpolymer

[0033] Preparation of 30% sodium acrylate aqueous solution: A. Dissolve 72g of acrylic acid in 100g of deionized water; B. Dissolve 40g of sodium hydroxide in 101.33g of deionized water; The sodium solution was mixed to obtain a 30% NaAA solution;

[0034] 10% cetyl allyl dimethyl ammonium chloride (C 16 DMAAC) solution preparation: take by weighing 10g cetyl allyl dimethyl ammonium chloride and be dissolved in 90g water, obtain 10% cetyl allyl dimethyl ammonium chloride (C 16 DMAAC) solution;

[0035] Weigh 349.507g of deionized water into the reaction vessel, add 47.000g of 30% sodium acrylate solution, 17.275g of 10% hexadecyl allyl dimethyl ammonium chloride solution, 59.995g of acrylamide, ethylenediaminetetra Disodium acetate 0.076g, photoinitiator 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methylacetone 0.038g, after mixing evenly, adjust the pH value to the range of 11-12 In...

Embodiment 2

[0041] Embodiment 2, the impact of light time on properties such as polymer viscosity shown in formula I

[0042] By adjusting the light time to achieve a certain amount of decomposition of the photoinitiator within each period, the polymerization process was divided into four stages. In the test, the total time of the light time and the light-off time in each stage was set to 10 minutes, and the light intervals were: 2.5 minutes of light, 7.5 minutes of cut-off; 3 minutes of light, 7 minutes of cut-off; 4 minutes of light, 6 minutes of cut-off; 3min, the photoinitiator decomposition amount changes with time in each period as follows figure 2 As shown, after adjusting the light mode, the decomposition amount of the photoinitiator is constant every 10 minutes. The monomer concentration is 10%, and other reaction conditions are consistent with those in Example 1. After polymerization, the polymer shown in formula I is obtained, and its viscosity test is carried out. The result...

Embodiment 3

[0043] Embodiment 3, the influence of light intensity on properties such as polymer viscosity shown in formula I

[0044] The light intensity was changed by changing the effective passage area of ​​ultraviolet light, and the fixed light time was 40 minutes. Two optimization methods were adopted, as shown in Table 1, the monomer concentration was 10%, and other reaction conditions were exactly the same as in Example 1. The photoinitiator decomposition trend is as follows Figure 4 As shown, using exponential optimization, the decomposition amount of photoinitiator per unit time is a certain value. Viscosity test was carried out after polymerization, and the result was: the viscosity of the polymer obtained by direct polymerization without changing the light intensity was 286.7 Pa s, the viscosity of the polymer obtained by optimization method 1 was 353.9 Pa s, and the viscosity of the polymer obtained by optimization method 2 was 445.0 Pa·s. When the number of light intensity...

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Abstract

The invention discloses a hydrophobically associating polymer, a preparation method and an application thereof. The hydrophobically associating polymer is shown as formula I, wherein x is 0.001-0.01, y is 0.7-1.0 and X is C1, Br or I. The preparation method comprises the steps of uniformly mixing acrylic acid, acrylamide, hydrophobic monomer, light initiator and ethylene diamine tetraacetic acid in deionized water, allowing reaction in illumination conditions; and after reaction, obtaining the polymer. The invention adopts ultraviolet-induced polymerization, so that the total activation energy is low and the reaction can be performed at low temperature; the product has better repeatability and the product quality is more stable; the polymerization can be controlled by powering on and powering off, at the same time the performance of the hydrophobically associating polymer can be controlled by controlling illumination time and light source strength. The polymer of the invention shows better dissolubility and viscosity in water and can form a space network structure in the solution.

Description

technical field [0001] The invention belongs to the field of functional polymers, and in particular relates to a hydrophobic association polymer and its preparation method and application. Background technique [0002] Hydrophobic association polymer (Feng Yujun, Luo Chuanqiu, Luo Pingya, etc., Study on the solution structure of hydrophobic association water-soluble polyacrylamide. Journal of Petroleum (Petroleum Processing, 2001, 17 (6), 39-44) is an important Water-soluble macromolecular compounds have a small amount of hydrophobic groups (mole fraction generally ≤ 2%) on the hydrophilic macromolecular chain, and their solutions have special rheological properties. Due to their high shear performance The shear resistance and the unique mechanism of heat resistance and salt resistance in high temperature and high salt solution, and even the phenomenon of economical and efficient thickening of brine may occur, making it a hot research topic in the field of water-soluble poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F226/02C08F2/46C09K8/588
Inventor 冯茹森郭拥军王用良周薇薛新生
Owner CHINA NAT OFFSHORE OIL CORP
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