Surface microphase separation in PDMS‐b‐PMMA‐b‐PHFBMA triblock copolymer films

Abstract

Well-defined poly(dimethylsiloxane)-blockpoly(methyl methacrylate)-block-poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate) (PDMS-b-PMMA-b-PHFBMA) triblock copolymers were synthesized via atom transfer radical polymerization (ATRP). Surface microphase separation in the PDMS-b-PMMA-b-PHFBMA triblock copolymer films was investigated. The microstructure of the block copolymers was investigated by transmission electron microscopy (TEM) and atomic force microscopy (AFM). Surface composition was studied by X-ray photoelectron spectroscopy (XPS). The chemical composition at

Tomography of Electrospun Carbon Nanotube Polymeric Blends by Focus Ion Beam: Alignment and Phase Separation Analysis from Multicontrast Electron Imaging

“…Indeed, bright areas in electron microscopy images in Figure are confined to island‐like regions with sizes varying between the micron and the sub‐micron scale. Notably, the 10 μm wide fiber confers PMMA a dominant matrix role, where PDMS phase separates, contrary to the expected behavior where the more hydrophobic PDMS, i.e., lower surface energy, surfaces to the vacuum or air‐sided interfaces . We attribute these differences to effects derived from the electrospinning process, where surface tension, viscosity, and conductivity affect phase separation dynamics.…”

Fluorosilicones and Other Fluoropolymers

“…Well-defined poly(dimethylsiloxane)-block-poly (methyl methacrylate)-block-poly(2,2,3,3,4,4,4hepta fluorobutyl methacrylate) (PDMS-b-PMMA-b-PHFBMA) triblock copolymers were synthesized by Lian et al via ATRP, and their microstructures were investigated using atomic force microscopy (AFM) [56]. 6: Fluorosilicones and Other Fluoropolymers: Synthesis, Properties, and Applications Fluorinated polymers have often been reported to present a wide range of attractive properties [57,58] and to be especially suitable as water and oil repellent or non-wettable coatings on textiles, leather, paper, glass, metal, other substrates, and so on [59][60][61].…”

Synthesis and comparison of two poly (methyl methacrylate-b-3-(trimethoxysilyl)propyl methacrylate)/SiO 2 hybrids by “grafting-to” approach

“…Therefore, in this paper, the well-defined diblock copolymer containing PMPS segment is designed for facility the pendent RASi(OCH 3 ) 3 groups to hydrolyze easily into RASi(OH) 3 in a base or acid catalyst, which can subsequently react with TEOS to generate polymeric/silica hybrids [27,28]. On the other hand, poly (methyl methacrylate) (PMMA) segment is designed as one block for improving the solubility and the filmforming ability of copolymer [29][30][31].…”