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Creation and Recombination of Free Radicals in Fluorocarbon Plasma Polymers: An Electron Spin Resonance Study
Author(s) -
Haupt Michael,
Barz Jakob,
Oehr Christian
Publication year - 2008
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200700096
Subject(s) - radical , polymer , plasma , electron paramagnetic resonance , kinetics , recombination , fluorocarbon , polymerization , plasma polymerization , materials science , photochemistry , chemistry , analytical chemistry (journal) , polymer chemistry , organic chemistry , nuclear magnetic resonance , composite material , biochemistry , physics , quantum mechanics , gene
Generation and recombination processes of plasma‐induced radicals in plasma polymers are investigated using ESR, which provides valuable information about radicals in thin polymer films. The polymer films are prepared by means of r.f. plasma polymerization of c ‐C 4 F 8 . Radical numbers and densities of fluorocarbon plasma polymer coatings of different thicknesses are measured by extrapolating mixed‐order recombination processes. The kinetics of radical generation in plasma polymer films is modeled using the results of the time‐dependent radical decay studies. The life times, line‐broadening effects, activation energies, and the temperature behavior of the radicals are discussed.