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Surface Chemical Analysis of Plasma‐Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allylamine
Author(s) -
Swaraj Sufal,
Oran Umut,
Lippitz Andreas,
Unger Wolfgang E. S.
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.200700106
Subject(s) - copolymer , allylamine , ethylene , styrene , materials science , chemical engineering , polymer chemistry , plasma , chemistry , organic chemistry , composite material , polyelectrolyte , polymer , catalysis , engineering , physics , quantum mechanics
Abstract Plasma deposited ethylene/allylamine and styrene/allylamine copolymer films were prepared and analyzed using XPS, NEXAFS and ToF‐SIMS. The relative partial flow rate of the each monomer was used as the variable deposition parameter, while the other deposition parameters were kept constant at optimized values for the retention of functional groups. The effect of the variation in the relative partial flow rates of co‐monomers on various chemical aspects of the films like unsaturation, nitrogen retention and branching was investigated revealing several non‐linear correlations. This observation is taken as an indication for chemical copolymerization processes during film deposition. An attempt is made to compare these non‐linear correlations with approaches which have been developed for classic radical copolymerization processes. The aging behavior of these plasma copolymer films was also studied; the results indicated a stabilization against oxidation in comparison to the aging of allylamine plasma homopolymers.