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Surface modification of radiation‐grafted polymer films and membranes by crosslinking
Author(s) -
Schnyder Bernhard,
Rager Timo
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25908
Subject(s) - grafting , polystyrene , membrane , polymer chemistry , polymer , styrene , materials science , monomer , divinylbenzene , x ray photoelectron spectroscopy , chemical engineering , copolymer , surface modification , phase (matter) , chemistry , composite material , organic chemistry , biochemistry , engineering
The surface composition of radiation‐grafted FEP‐ g ‐poly(styrene‐ co ‐divinylbenzene) films and its sulfonated analogues was investigated by X‐ray photoelectron spectroscopy. These investigations demonstrate that the surface composition is strongly influenced by the degree of crosslinking of the polystyrene phase. In the absence of a crosslinker, the surface concentration of the grafting component was high and could even exceed the calculated average concentration in the volume of the polymer. With increasing crosslinker concentration, the surface concentration of the grafting component decreased rapidly and became close to zero for crosslinker concentrations above 2% in the monomer mixture. The effect was most pronounced in the case of grafted films and weaker in the case of sulfonated membranes. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1973–1978, 2007