ATRP technology was used to synthesize polymethyl methacrylate-b-poly (methacrylic acid-2-perfluorooctylethyl) (PMMA144-b-PFMAn) block copolymers with different lengths of fluorine-containing segments. , XPS, SFG,
Surface tension, DLS and other technologies have studied the gas / liquid interface properties of PMMA144-b-PFMAn solutions with different fluorine-containing lengths, the aggregation behavior of polymer molecules in solution and their surface structure and performance after curing. A few fluorinated structures were found The block copolymer of the unit exhibits excellent hydrophobicity and oleophobicity. The growth of the fluorine-containing segment decreases its surface properties. A study of its surface structure found that the increase in fluorine content makes the fluorine-containing components enrich on the surface. The increase of F is limited, and the F / C ratio increases with the depth. At the same time, the order of perfluoroalkyl groups on the surface decreases. When the length of the fluorinated structural unit is 10, PMMA appears on the surface layer of the copolymer. Segment. The main reason is that the length of the fluorine-containing segment affects the aggregation structure and gas / liquid interface structure of the block copolymer molecules in the solution, which affects the formation of its surface structure during the curing process. The results show that the high fluorine content The polymer does not necessarily have excellent surface properties, and the proper solution properties have an important influence on the formation of the surface structure of the fluoropolymer.
Surface tension, DLS and other technologies have studied the gas / liquid interface properties of PMMA144-b-PFMAn solutions with different fluorine-containing lengths, the aggregation behavior of polymer molecules in solution and their surface structure and performance after curing. A few fluorinated structures were found The block copolymer of the unit exhibits excellent hydrophobicity and oleophobicity. The growth of the fluorine-containing segment decreases its surface properties. A study of its surface structure found that the increase in fluorine content makes the fluorine-containing components enrich on the surface. The increase of F is limited, and the F / C ratio increases with the depth. At the same time, the order of perfluoroalkyl groups on the surface decreases. When the length of the fluorinated structural unit is 10, PMMA appears on the surface layer of the copolymer. Segment. The main reason is that the length of the fluorine-containing segment affects the aggregation structure and gas / liquid interface structure of the block copolymer molecules in the solution, which affects the formation of its surface structure during the curing process. The results show that the high fluorine content The polymer does not necessarily have excellent surface properties, and the proper solution properties have an important influence on the formation of the surface structure of the fluoropolymer.
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