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Precise Synthesis and Surface Characterization of End‐Functionalized Polystyrene with Perfluoroalkyl Group via Ionic Bond Formation of Diethylamino End‐Group with Perfluoroalkylcarboxylic Acid
Author(s) -
Sugiyama Kenji,
Yamada Takeshi
Publication year - 2017
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600444
Subject(s) - polystyrene , polymer chemistry , chemistry , x ray photoelectron spectroscopy , end group , methanol , ionic bonding , polymer , contact angle , styrene , polymerization , surface modification , functional group , materials science , copolymer , organic chemistry , chemical engineering , ion , engineering , composite material
Well‐defined polystyrene end‐functionalized with N , N ‐diethylamino group (PS‐NEt 2 ) is prepared by a living anionic polymerization of styrene, followed by an end‐capping reaction with a 1,1‐diphenylethylene derivative bearing with the corresponding functional group. The PS‐NEt 2 is applied for the reaction with C 8 F 17 COOH in order to introduce the ionic‐bonded C 8 F 17 group, i.e., C 8 F 17 COO − N + H(C 2 H 5 ) 2 at the polymer chain end. Surface characterization of the resulting polymer film is performed by an X‐ray photoelectron spectroscopy and a contact angle measurement. These results clearly show that the C 8 F 17 COO − N + H(C 2 H 5 ) 2 end‐group concentrates at the top of film surface similar to the original C 8 F 17 group. The ionic‐bonded C 8 F 17 COOH is found to be removed by a treatment of the film surface with methanol. Moreover, the C 8 F 17 COO − N + H(C 2 H 5 ) 2 end‐group that remained inside film appears at the top of film surface by annealing the methanol‐treated film, indicating the surface reconstruction by environmental changes.