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Sulfonation degree determination of polystyrene ionomers by using adiabatic bomb calorimeter
Author(s) -
Alkan Cemil,
Dumanlı Ahu Gümrah,
Aras Leyla
Publication year - 2006
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.22970
Subject(s) - calorimeter (particle physics) , polystyrene , enthalpy , adiabatic process , combustion , materials science , calorimetry , polymer chemistry , thermodynamics , analytical chemistry (journal) , chemistry , organic chemistry , polymer , physics , composite material , detector , optics
Sulfonation degree determination of sulfonated polystyrene and the corresponding ionomers are performed by adiabatic bomb calorimeter. The theoretical calculations from the band energies for the combustion enthalpy values (calorific values) and the experimental values are compared, and a linear relation between the values is found. Sulfonation and neutralization processes are examined by elemental sulfur analysis and atomic absorption spectroscopy (AAS). It was obvious that increasing sulfonation degree yields a decrease in the combustion enthalpy values, as it is expected from the theoretical calculations. In addition, metal ion incorporation to the structure deviates the experimental combustion enthalpy values especially for the ionomers which have higher sulfonation degrees. This is due to the formation of a higher degree aggregation. © Wiley Periodicals, Inc. J Appl Polym Sci 100: 4684–4688, 2006