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Effects of some solvents on the thermal and free‐volume properties of poly(4‐vinylpyridine) complexes
Author(s) -
Mazroua A.,
Gomaa E.
Publication year - 2008
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.28416
Subject(s) - toluene , polymer chemistry , volume fraction , solvent , polymer , benzene , fourier transform infrared spectroscopy , xylene , chemistry , thermal stability , infrared spectroscopy , materials science , chemical engineering , organic chemistry , engineering
Modified poly(4‐vinylpyridine) (P4VP) and its complexes were prepared with different solvents such as benzene, toluene, and xylene as well as potassium chloride (KCl) and copper chloride (CuCl 2 ). Fourier transform infrared spectroscopy, thermal analysis, and positron annihilation spectroscopy were used to investigate the properties of the modified P4VP and its complexes. It was concluded that complexes were formed between the polymer and solvents via quaternization of nitrogen in the ring with the solvents and also with KCl and CuCl 2 ·2H 2 O. Furthermore, the modified P4VP–CuCl 2 complexes were more stable than the modified P4VP–KCl complexes, and these complexes were more stable than the P4VP–solvent complexes. Ortho ‐positronium components (τ 3 , I 3 ) were used to estimate the nanoscale free‐volume hole size ( V f ) and the free‐volume fraction (f %). The free‐volume hole size and its fractions depended on the addition of solvents and metals to the polymer. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008