Preparation of bifunctional macronet polymers having both strongly and weakly acidic groups in one step. Gel-solution transition of a transformable hydrogel

Theodoropoulos, AG; Theodosakis, GI; Valkanas, GN; Mamalis, AD

dc.contributor.author	Theodoropoulos, AG	en
dc.contributor.author	Theodosakis, GI	en
dc.contributor.author	Valkanas, GN	en
dc.contributor.author	Mamalis, AD	en
dc.date.accessioned	2014-03-01T01:12:11Z
dc.date.available	2014-03-01T01:12:11Z
dc.date.issued	1996	en
dc.identifier.issn	0032-3861	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12002
dc.subject	Bifunctional ion exchangers	en
dc.subject	Gel-solution transition	en
dc.subject	Macronets	en
dc.subject	Post-polymerization crosslinking	en
dc.subject	Swelling	en
dc.subject	Transformable hydrogel	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Chemical modification	en
dc.subject.other	Crosslinking	en
dc.subject.other	Hydrogels	en
dc.subject.other	Hydrolysis	en
dc.subject.other	Infrared spectroscopy	en
dc.subject.other	Ion exchangers	en
dc.subject.other	Phase transitions	en
dc.subject.other	Polyacrylonitriles	en
dc.subject.other	Polymerization	en
dc.subject.other	Polystyrenes	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Sulfonation	en
dc.subject.other	Acidic groups	en
dc.subject.other	Bifunctional ion exchangers	en
dc.subject.other	Elemental analysis	en
dc.subject.other	Gel solution transition	en
dc.subject.other	Macronet polymers	en
dc.subject.other	Post polymerization	en
dc.subject.other	Titrimetric determination	en
dc.subject.other	Transformable hydrogel	en
dc.subject.other	Copolymers	en
dc.title	Preparation of bifunctional macronet polymers having both strongly and weakly acidic groups in one step. Gel-solution transition of a transformable hydrogel	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0032-3861(96)87265-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0032-3861(96)87265-X	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	The hydrolysis, sulfonation and crosslinking modification of a poly(styrene-co-acrylonitrile) copolymer in one step was studied. An extremely vigorous process has been developed for the preparation of a series of hydrophilic gels bearing strongly and weakly acidic groups on the same polymer backbone. The products were characterized using infra-red spectra, scanning electron microscopy, elemental analysis and titrimetric determination of the strongly and weakly acidic groups. Kinetic data and swelling measurements in aqueous media were also performed. A fully transformable hydrogel was obtained from a series of macronet products having different degrees of crosslinking. This irreversible gel-solution transition was recorded within 15 weeks, a fact that indicates that these polymers may have specific applications in fields where separation media are required, or as transformable soil conditioners.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer	en
dc.identifier.doi	10.1016/0032-3861(96)87265-X	en
dc.identifier.isi	ISI:A1996UB45800021	en
dc.identifier.volume	37	en
dc.identifier.issue	5	en
dc.identifier.spage	855	en
dc.identifier.epage	861	en