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Thermally modified acrylic polymers as sorbents
Author(s) -
Simitzis Johannis
Publication year - 1995
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1995.210360307
Subject(s) - sorption , polymer , sorbent , materials science , chemical engineering , pyrolysis , aqueous solution , polymer chemistry , organic chemistry , composite material , chemistry , adsorption , engineering
Acrylic fibres were modified with ethylene diamine and pyrolysed at temperatures up to 600°C. According to IR spectroscopy, polymers pyrolysed at 300°C contain nitrile and other groups which are present in the initial polymer. The specific surface area is decreased by increasing the pyrolysis temperature. The pore size distribution reveals mainly the presence of macropores. Acrylic polymers and those pyrolysed at 300°C sorb more methylene blue and alizarin yellow from aqueous solution than a non‐polar commercial sorbent of high specific surface area. The experimental results for dye sorption were treated theoretically using a diffusion‐limited sorption method. The polymers can be ranked by the parameters of this method or their sorption ability. The dye sorption is little affected by the pores of the polymers and is mainly affected by the interactions between the functional groups of the polymers and those of the dyes.