A kind of polymer with surface active function and its preparation method and application

Abstract

The invention relates to the field of polymers, and particularly discloses a polymer with surface activity as well as a preparation method and application of the polymer. The polymer comprises a structure unit A, a structure unit B and a structure unit C, wherein the structure unit A has a structure as shown in formula (1); the structure unit B has a structure as shown in formula (2); the structure unit C has a structure as shown in formula (3). The polymer with the surface activity is good in surface activity, capable of thickening aqueous medium and resistant to temperature and salinity. Theformulas are as shown in the description.

Description

technical field [0001] The present invention relates to the field of polymers, in particular to a polymer with surface active function, a method for preparing the polymer with surface active function, a polymer with surface active function prepared by the method, and the Application of polymers with surface active functions as oil displacement agents. Background technique [0002] In order to solve the problem of poor temperature resistance and salt resistance of polymers used for oil displacement, researchers proposed a method of introducing functional monomers into the molecules and increasing the molecular weight of polymers to improve the apparent viscosity and temperature resistance of polymer aqueous solutions. Salt performance, thus developed hydrophobic association polymers, comb polymers, temperature-resistant and salt-resistant polymers, etc., but these polymers do not have surface activity and oil washing ability. [0003] In the tertiary oil recovery technology,...

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Problems solved by technology

[0007] In US4138381, US4463151 and EP426864, alkyl or alkylphenol polyoxyethylene ether acrylate surface-active monomers are copolymerized with acrylamide monomers, mainly utilizing the association of hydrophobic groups of surface-active monomers in water. Thereby, the viscosity of the copolymer is greatly increased, and the copolymer containing the surface active monomer component has better salt tolerance, but the amphiphilic macromonomer component is difficult to gather to the interface in the binary copolymer, therefore, The synthesized copolymer has poor surface activity

[0008] In CN1178802A, a terpolymer is obtained by copolymerizing acrylamide monomers, surface active macromonomers and ionic monomers. The copolymer has high viscosity but poor surface activity

Sun Lili and others from Southwest Petroleum Institute synthesized a new polymer surfactant (PS1) by homogeneous polymerization method. The polymer surfactant is a terpolymer of acrylamide, acrylic acid and methyl methacrylate. The ability of molecular surfactants to reduce surface tension is not as good as that of low-molecular surfactants. When they are compounded with inorganic salts, due to the synergistic effect, they will produce compound performance better than that of single surfactants, making the surface tension lower, but The polymer surfactant has poor heat and salt resistance

Jin Yong and others from the Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, used toluene diisocyanate and polyether as the main raw materials to synthesize a class of polymerizable nonionic polyurethane polymer surfactants with double bonds. When the concentration is 0.06mol / L, the surface tension of the solution can be reduced to 37.6mN / m (25°C), and at the same time, it can still maintain good surface activity at a very low concentration. In addition, the polymerizable nonionic polyurethane polymer surface activity The ability of the agent to reduce the surface tension increases with the increase of the proportion of the hydrophobic segment, but the polymerizable nonionic polyurethane polymer surfactant has poor polymerization activity and poor temperature resistance

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