Structural and morphological changes of monolayers of a block copolymer with dendron and perfluoroalkyl side chains by mixing a perfluorooctadecanoic acid.
Hybrid Langmuir and Langmuir-Blodgett monolayers of a perfluorooctadecanoic acid mixed with a rigid block copolymer, poly(3,5-bis(3,5-bis(benzyloxy)benzyloxy)benzyl methacrylate-randommethacrylic acid)-block-poly(2-perfluorooctylethyl acrylate), which is composed of benzyloxy dendron side chains and perfluorinated side chains, were prepared and characterized by surface pressure-surface area isotherms, atomic force microscopic images and neutron and X-ray reflectometries. The two-dimensionally phase-separated structures of monolayer films and their morphologies with plateau and terrace were confirmed. The monolayers were separated into a dendron layer, a perfluorinated layer, and a carboxyl layer. The layer formation is originated not only in the intermolecular interaction between a perfluorooctadecanoic acid and a block copolymer but also in the geometry of the molecules. Especially, the amphiphilicity of perfluorinated surfactant plays a role to the ordered array of the block copolymers.
Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
Koji
K
Mitamura
Toyoko
T
Imae
Emiko
E
Mouri
Naoya
N
Torikai
Hideki
H
Matsuoka
Tetsuya
T
Nakamura
D000478:Alkylation; D000873:Anthracenes / Q000737:chemistry*; D003652:Decanoic Acids / Q000737:chemistry*; D005466:Fluorocarbons / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D009502:Neutrons; D013816:Thermodynamics; D014961:X-Ray Diffraction
D000873:Anthracenes; D003652:Decanoic Acids; D005466:Fluorocarbons; C501244:dendron; C036567:perfluorodecanoic acid