MODIFIED POLYACRYLONITRILE FOR ADSORPTION APPLICATIONS

SIMITZIS, J

dc.contributor.author	SIMITZIS, J	en
dc.date.accessioned	2014-03-01T01:42:53Z
dc.date.available	2014-03-01T01:42:53Z
dc.date.issued	1994	en
dc.identifier.issn	0323-7648	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23970
dc.subject.classification	Polymer Science	en
dc.subject.other	ACRYLAMIDE	en
dc.title	MODIFIED POLYACRYLONITRILE FOR ADSORPTION APPLICATIONS	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1994	en
heal.abstract	Polyacrylonitrile (PAN) was produced by redox polymerization of acrylonitrile and then was modified with 50% aqueous solutions of H2SO4 or NaOH. Copolymers of acrylonitrile' with acrylic acid, acrylamide or methylenebisacrylamide were prepared by radical polymerization. The structures of these polymers based on PAN were studied by IR-spectroscopy in order to determine their characteristic groups. The cation exchange capacity is higher in polymers containing more acidic groups (COOH), and for the examined cases the adsorbability was Cu2+ > Zn2+ (ion exchange selectivity). The discoloring ability of the examined polymers was studied with aqueous solutions of three dyes, i.e. methylene blue (cationic or basic dye), congo red (direct dye having similarities with anionic dyes) and alizarin yellow (acid dye or anionic monoazo dye). The results are interpreted in terms of electron donor-acceptor (EDA) interactions between the main groups of the polymers and the dyes. The presence of -CONH2 (having polar character) in the polymers based on PAN, produces favorable interactions with the groups (electron donor or acceptor) of the molecules of the three dyes. The design of new polymer materials based on PAN with increased adsorption ability, could be performed with such a discoloring investigation, especially for methylene blue and alizarin yellow.	en
heal.publisher	VCH PUBLISHERS INC	en
heal.journalName	ACTA POLYMERICA	en
dc.identifier.isi	ISI:A1994NK36800008	en
dc.identifier.volume	45	en
dc.identifier.issue	2	en
dc.identifier.spage	104	en
dc.identifier.epage	109	en