DSpace Repository

Aggregation in aqueous solutions of some cationic amphiphilic polyelectrolytes [articol]

Show simple item record

dc.contributor.author Stanciu, Magdalena Cristina
dc.contributor.author Nichifor, Marieta
dc.contributor.author Simionescu, B.C.
dc.date.accessioned 2020-04-02T09:34:30Z
dc.date.accessioned 2021-03-01T08:45:53Z
dc.date.available 2020-04-02T09:34:30Z
dc.date.available 2021-03-01T08:45:53Z
dc.date.issued 2010
dc.identifier.citation Stanciu, M. C.. Aggregation in aqueous solutions of some cationic amphiphilic polyelectrolytes. Timişoara: Editura Politehnica, 2010 en_US
dc.identifier.uri http://primo.upt.ro:1701/primo-explore/search?query=any,contains,Aggregation%20in%20aqueous%20solutions%20of%20some%20cationic%20amphiphilic%20polyelectrolytes&tab=default_tab&search_scope=40TUT&vid=40TUT_V1&lang=ro_RO&offset=0 Link Primo
dc.description.abstract Aqueous solutions of amphiphilic polyelectrolytes, based on polysaccharides having N-(2-hydroxypropyl)-N, N-dimethyl-N-alkyl ammonium chloride as pendant groups are used for the discrimination between intra- and intermolecular hydrophobic interactions as a function of polymer physico-chemical characteristics, with a special attention paid to molecular weight and polysaccharide backbone. The aggregates characteristics are determined by steady-state fluorescence (critical aggregation concentration - CAC and micropolarity), fluorescence anisotropy (microviscosity) and capillary viscometry (macroviscosity) measurements. The results highlight the dependence of aggregate characteristics on degree of substitution with hydrophobic pendant groups, the length of alkyl substituent R, molecular weight and type of polysaccharides. CAC values decrease with the increase of the R length. The molecular weight and the nature of the polysaccharide have a reduced influence on CAC values. Higher anisotropy values are obtained for higher molecular weight and lower values of the degree of substitution. Up-level values of the reduced viscosity, at high polymer concentration, are characteristic for polymers with low DS and high Mw or backbone’s flexibility. en_US
dc.language.iso en en_US
dc.publisher Timişoara: Editura Politehnica en_US
dc.relation.ispartofseries Seria chimie şi ingineria mediului, Tom 55(69), fasc. 1 (2010);
dc.subject Electrochimie en_US
dc.subject Electroliţi en_US
dc.subject Articol en_US
dc.subject Amphiphilic polyelectrolytes en_US
dc.subject Self-aggregation en_US
dc.subject Fluorescence en_US
dc.subject Capillary viscometry en_US
dc.title Aggregation in aqueous solutions of some cationic amphiphilic polyelectrolytes [articol] en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse

My Account