Fluorine-containing block graft polymer with thermosensitivity and preparation method and application thereof

Abstract

The invention discloses a fluorine-containing block graft polymer with thermosensitivity and a preparation method and application thereof. According to the invention, fluorine-containing acrylate monomers are polymerized into a macroinitiator by adopting atom transfer radical polymerization; the macroinitiator and glycidyl methacrylate are copolymerized; and after an azide group is introduced into a side chain epoxide cleavage of the obtained product, a polymer with thermosensibility is grafted by adopting the click chemical reaction so as to obtain the block graft polymer. The fluorine-containing block graft polymer has mild reaction conditions, is easy to operate and has high reaction speed and high conversion rate. The preparation method of the fluorine-containing block graft polymer with thermosensitivity, which is disclosed by the invention, is simple and convenient to operate, and has low toxicity and high product purity; and the prepared fluorine-containing block graft polymer with thermosensitivity not only has the advantages of fluorine-containing materials, but also has excellent performance of thermosensitivity and realizes function combination.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular relates to a temperature-sensitive fluorine-containing block graft polymer and its preparation method and application. Background technique [0002] With the continuous deepening of research on intelligent polymer materials and the continuous improvement of market demand, the research and development of intelligent materials with dual or even multiple responsiveness has become an important development direction in this field. For fluorine-containing intelligent polymer materials, due to the various advantages and specificities of fluorine-containing polymers, and its intelligent characteristics will respond to external environmental stimuli, this type of functional polymer materials with multiple characteristics research has received great attention. [0003] Fluorine-containing intelligent polymer materials combine their own fluorine-containing characteris...

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Problems solved by technology

[0004] Patent 200610038477.4 discloses a pH-responsive fluorine-containing block copolymer and its preparation method. This method overcomes the harsh reaction conditions of traditional anionic polymerization and obtains a high conversion rate and pure product. However, the copolymer synthesized by this method is Binary block structure, single structure, harsh reaction conditions, difficult operation, and its simple assembly shape limits its application range; patent 200610038134.8 discloses an amphiphilic fluorine-containing block copolymer and its preparation method. Although the product has dual responsiveness to temperature and pH value, it still stays in the stage of binary linear block polymer, its structure is relatively simple, its synthesis method is relatively harsh, and its application range is small; patent 200610041276.X discloses a fluorine-containing Hyperbranched-grafted block polymers and their preparation, but due to the method of synthesizing hyperbranched polymers using the method of nuclei first and then arms, the synthesis conditions are relatively harsh, and because the system adopts a one-pot method for the growth of arms and cores, resulting in the system Increased steric hindrance limits arm growth

[0005] Although there are also reports on the synthesis of temperature-sensitive fluorine-containing materials, there are few reports on the combination of linear and nonlinear block graft polymers, especially by adjusting the length of the main side chain of the polymer. There are fewer research reports on regulating the temperature sensitivity and hydrophilicity and hydrophobicity of polymers with grafting density.

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