Semifluorinated diblock copolymers. Synthesis, characterisation and amphiphilic properties

Abstract

Semifluorinated diblock copolymers based on methyl methacrylate and 1 H , 1 H,2H,2H-perfluoroalkyl methacrylates were prepared by nucleophilic catalysed group transfer polymerisation. Characterisation was carried out by 'H NMR spectroscopy, differential scanning calorimetry (DSC) and gel-permeation chromatography (GPC) in toluene. The latter method revealed the formation of micelles. The surface activity of the materials was demonstrated by tensiometry using a Wilhelmy balance. Measurements on thin polymer films showed low critical surface tensions and low dispersion force contributions to the surface energy indicating the presence of the fluorinated block at the surface.

Acorn‐Shape Polymeric Nano‐Colloids: Synthesis and Self‐Assembled Films

“…While transmission electron microscopy (TEM) images of these particles are illustrated in Figure 1A, Figure 1B shows a photograph of acorns. [19] Experimental Part MMA, nBA, PFS, and sodium dioctylsulfosuccinate (SDOSS) were purchased from Aldrich Chemical Co. Water-soluble initiator 2,2 0 -azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (VA-44) was purchased from Wako Pure Chemicals Ind. Ltd. Bio-Rad AG 501-X8 cation-anion resin was purchased from Bio-Rad laboratories, Inc. and polytetrafluoroethylene (PTFE) substrate was purchased from Electron Microscopy Sciences.…”

“…Morphologies of the colloidal particles were determined using a Zeiss EM 109-transmission electron microscope in which colloidal dispersions were diluted to a 10 000: 1 volume ratio A. Misra, M. W. Urban Figure 1. TEM micrograph of the acorn-shaped morphology of the synthesized colloidal particles (A) and an optical image of acorns from nature [19] (B). (DDI H 2 O/dispersions) and deposited on a formvar-coated copper TEM grid (Ted Pella, Inc.).…”

Synthesis and characterization of poly(ethylene oxide) and poly(perfluorohexylethyl methacrylate) containing triblock copolymers

“…[6] They have many uses as emulsifier in liquid and supercritical carbon dioxide [7,8] and as surfactant for stabilization of polyurethane foams. [9] So far few attempts have been made to prepare semifluorinated block copolymers by means of anionic, [10] cationic, [2] ring opening metathesis, [11] living radical, [12] group transfer, [13] atom transfer radical polymerization [14] and by selective addition of perfluoroalkyl iodides to the C C double bond. [15] Most of the studies that have been carried out on semi-fluorinated block copolymers discuss their behavior at surfaces/interfaces.…”

Synthesis of cationic UV‐curable methacrylate copolymers and properties of the cured films of their composites with alicyclic epoxy resin

“…The typical peaks of ACF 2 ACHFACF 3 at d 110-125 were determined. 19 According to both of FTIR, 1 H NMR, and 13 C NMR spectra the chemical structures of the copolymers were confirmed.…”