Composite initiator of hydrophobic associated polymer and preparation method of hydrophobic associated polymer

Abstract

The invention provides a composite initiator of a hydrophobic associated polymer and a preparation method of the hydrophobic associated polymer. The composite initiator is prepared from the following raw materials in parts by weight: 1-10 parts of potassium persulfate, 1-10 parts of ammonium persulfate, 0.5-5 parts of dibenzoyl peroxide, 1-10 parts of sodium hydrogen sulfite, 1-10 parts of sodium sulfite, 0.1-1 part of triethanolamine, 0.5-5 parts of urea, 0.5-5 parts of thiourea, 0.05-0.5 part of azodiisobutyronitrile and 0.05-0.5 part of azobis(isobutylamidine hydrochloride). The method comprises the following steps: a sequentially adding disodium ethylenediamine tetraacetate, sodium formate, lauryl sodium sulfate, acrylamide, AMPS-Na and DiC8AM to deionized water under a magnetic stirring condition, and fully stirring evenly; b introducing high-purity nitrogen into a mixed solution obtained from the step a, adding the composite initiator, and polymerizing to obtain hydrophobic associated polymer gel; and c coarsely crushing the hydrophobic associated polymer gel obtained from the step b, adding sodium hydroxide, hydrolyzing, drying in a blast drying oven, drying and crushing to obtain the product.

Description

Technical field: [0001] The invention belongs to the field of synthesizing hydrophobic association polymers by aqueous solution polymerization, in particular to a composite initiator capable of synthesizing hydrophobic association polymers with high molecular weight and low residual AM content. Background technique: [0002] Hydrophobically Associating Water-Soluble Polymers (Hydrophobically Associating Water-Soluble Polymers, or Hydrophobically Associating Water-Soluble Polymers) refers to a class of water-soluble polymers containing a small amount of hydrophobic groups on the hydrophilic macromolecular chain of the polymer. The group content is generally lower than 5% mol. In aqueous solution, the hydrophobic groups aggregate due to the hydrophobic effect, causing macromolecular chains to produce intramolecular and intermolecular associations. The intramolecular association and intermolecular association are related to the concentration of the hydrophobic association poly...

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Problems solved by technology

In terms of evaluation methods and specific research on the residual acrylamide content of polymers, GB12005.3-1989, GB12005.4-1989 and GB12005.5-1989 provide detection methods for residual acrylamide in polyacrylamide; patent CN101649022A introduces a A preparation method for reducing the residual monomer content of anionic polyacrylamide, the core content of which is to optimize the production process and synthesize AM / AMPS / AA copolymers with a residual monomer content of less than 0.05%; patent CN101111526A introduces a low residual monomer The production method of water-soluble or water-swellable polymers with high volume content, the core content of which is to carry out electromagnetic radiation after the polymerized monomer solution reaches the maximum temperature. Although this method can improve the conversion rate of monomers and achieve low residual monomer content, it increases The electromagnetic radiation production process is increased, which increases the manufacturing cost

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