Comb-Like Fluorinated Polystyrenes Having Different Side Chain Interconnecting Groups
Comb-like fluorinated polystyrenes with different side chain interconnecting groups between backbone and side chain, such as ether (PST−O), thioether (PST−S) and sulfone (PST−SO2), were synthesized in order to examine the effect of the interconnecting groups on the surface order and properties. Near...
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Veröffentlicht in: | Macromolecules 2009-05, Vol.42 (9), p.3333-3339 |
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Sprache: | eng |
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Zusammenfassung: | Comb-like fluorinated polystyrenes with different side chain interconnecting groups between backbone and side chain, such as ether (PST−O), thioether (PST−S) and sulfone (PST−SO2), were synthesized in order to examine the effect of the interconnecting groups on the surface order and properties. Near edge X-ray absorption fine structure spectroscopy and grazing incidence wide-angle X-ray diffraction showed that PST−SO2 with very polar sulfone groups exhibited a lower tilt angle of the fluorinated helix to the surface normal as well as higher packing density of fluorinated alkyl side chains than PST−O and PST−S, which have less polar groups. As a result of the ordered structure at the polymer-air interface, PST−SO2 has a smaller surface energy and better stability in water than PST−O and PST−S. These results suggest that the introduction of polar groups to the side chains of comb-like fluorinated polymers can improve the surface properties including the hydrophobicity and stability of fluorinated surfaces. |
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ISSN: | 0024-9297 1520-5835 |
DOI: | 10.1021/ma8027535 |