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dc.contributor.authorPatrickios, Costas S.en
dc.contributor.authorForder, C.en
dc.contributor.authorArmes, S. P.en
dc.contributor.authorBillingham, N. C.en
dc.creatorPatrickios, Costas S.en
dc.creatorForder, C.en
dc.creatorArmes, S. P.en
dc.creatorBillingham, N. C.en
dc.date.accessioned2019-11-21T06:22:07Z
dc.date.available2019-11-21T06:22:07Z
dc.date.issued1997
dc.identifier.issn0887-624X
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/55985
dc.description.abstractWater-soluble ABC triblock copolymers of methyl vinyl ether (MVE), ethyl vinyl ether (EVE), and methyl tri(ethylene glycol) vinyl ether (MTEGVE) of various block sequences and carrying 20 monomer units in each block were synthesized by living cationic polymerization. In addition to the triblocks, one AB diblock, one BA diblock, and one statistical copolymer of MVE and MTEGVE carrying 20 units of each type of monomer were synthesized as controls. Moreover, three homopolymers each carrying 20 units of MVE and end groups of varying hydrophobicity were synthesized using three different initiators. The molecular weights and molecular weight distributions of all the polymers were determined by gel permeation chromatography (GPC) in tetrahydrofuran (THF). The number average degrees of polymerization (DPns) and composition of all the polymers were calculated by proton nuclear magnetic resonance (1H-NMR) spectroscopy. The molecular weights and degrees of polymerization corresponded to the values expected from the monomer/initiator ratios. The calculated polydispersities were reasonably narrow at 1.3. Aqueous GPC studies at room temperature on the triblock copolymers showed that the polymers exist as isolated chains (unimers) in solution but they tend to assemble and form micelles in the presence of a sufficiently high salt concentration apparently due to the insolubility of the EVE units under the latter conditions. Triblocks with a different block sequence exhibited a different susceptibility to salt-induced micellization, as indicated by the retention volume of the micelles and the relative micelle/unimer peak areas. Similarly, the cloud points of the triblock copolymers covered a relatively wide temperature range from 56 to 72°C. These differences in micellization and cloud points suggest a profound effect of the location of the hydrophilic MTEGVE block on copolymer association. © 1997 John Wiley & Sons, Inc.en
dc.sourceJournal of Polymer Science, Part A: Polymer Chemistryen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0031143027&partnerID=40&md5=1e53afc1cdf91576a29de5c120297155
dc.subjectMicellesen
dc.subjectBlock copolymersen
dc.subjectNuclear magnetic resonance spectroscopyen
dc.subjectMolecular weight distributionen
dc.subjectGel permeation chromatographyen
dc.subjectMolecular structureen
dc.subjectLiving cationic polymerizationen
dc.subjectCationic polymerizationen
dc.subjectMethyl vinyl etheren
dc.subjectTriblock copolymersen
dc.subjectVinyl resinsen
dc.subjectAssociation reactionsen
dc.subjectABC triblock copolymersen
dc.subjectAqueous GPCen
dc.subjectBlock sequenceen
dc.subjectCloud pointen
dc.subjectEthyl vinyl etheren
dc.subjectMethyl tri(ethylene glycol) vinyl etheren
dc.subjectVinyl ethersen
dc.subjectWater-soluble copolymersen
dc.titleWater-soluble ABC triblock copolymers based on vinyl ethers: Synthesis by living cationic polymerization and solution characterizationen
dc.typeinfo:eu-repo/semantics/article
dc.description.volume35
dc.description.issue7
dc.description.startingpage1181
dc.description.endingpage1195
dc.author.faculty002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences
dc.author.departmentΤμήμα Χημείας / Department of Chemistry
dc.type.uhtypeArticleen
dc.description.notes<p>Cited By :53</p>en
dc.source.abbreviationJ.Polym.Sci.Part Aen
dc.contributor.orcidPatrickios, Costas S. [0000-0001-8855-0370]
dc.gnosis.orcid0000-0001-8855-0370


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