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dc.contributor.authorThemistou, Efrosynien
dc.contributor.authorPatrickios, Costas S.en
dc.creatorThemistou, Efrosynien
dc.creatorPatrickios, Costas S.en
dc.date.accessioned2019-11-21T06:23:12Z
dc.date.available2019-11-21T06:23:12Z
dc.date.issued2004
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/56211
dc.description.abstractAn acid-labile dimethacrylate cross-linker, dimethyldi(methacryloyloxy-1-ethoxy)silane (DMDMAES), was synthesized by the reaction of 2-hydroxyethyl methacrylate (HEMA) and dichlorodimethylsilane in the presence of triethylamine. Group transfer polymerization (GTP) was employed to use this cross-linker in the preparation of six hydrolyzable polymer structures: one neat cross-linker network, one randomly cross-linked network of methyl methacrylate (MMA), two star-shaped polymers of MMA, and two cross-linked star polymer model networks (CSPMNs) of MMA. A nonhydrolyzable CSPMN of MMA, based on a stable cross-linker, was also synthesized. Gel permeation chromatography (GPC) in tetrahydrofuran (THF) confirmed the narrow molecular weight distributions (MWDs) of the linear polymer precursors and demonstrated the increase in molecular weight (MW) upon each successive addition of cross-linker or monomer. Characterization by static light scattering (SLS) and GPC showed that star polymers with DMDMAES cores bear a relatively small number of arms, around 7. All star polymers and polymer networks were hydrolyzed using hydrochloric acid in THF. While the MWs of the products from the hydrolysis of the star polymers, the neat cross-linker network, and the randomly cross-linked network were as expected, those from the CSPMNs were of a much higher than expected MW, indicating extensive star-star coupling.en
dc.sourceMacromoleculesen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-4544388265&doi=10.1021%2fma049618%2b&partnerID=40&md5=b3ca0cb3f5a0cc9fa81c60c5affb5790
dc.subjectMathematical modelsen
dc.subjectSynthesis (chemical)en
dc.subjectOrganic polymersen
dc.subjectMonomersen
dc.subjectSiliconen
dc.subjectMolecular weight distributionen
dc.subjectLight scatteringen
dc.subjectHydrolysisen
dc.subjectGel permeation chromatographyen
dc.subjectPrecipitation (chemical)en
dc.subjectpH effectsen
dc.subjectPolymer networksen
dc.subjectStar polymersen
dc.subjectTetrahydrofuran (THF)en
dc.subjectHydrochloric aciden
dc.subjectStar couplingen
dc.titleSynthesis and characterization of star polymers and cross-linked star polymer model networks containing a novel, silicon-based, hydrolyzable cross-linkeren
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1021/ma049618+
dc.description.volume37
dc.description.issue18
dc.description.startingpage6734
dc.description.endingpage6743
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 :38</p>en
dc.source.abbreviationMacromoleculesen
dc.contributor.orcidPatrickios, Costas S. [0000-0001-8855-0370]
dc.contributor.orcidThemistou, Efrosyni [0000-0002-2335-3584]
dc.gnosis.orcid0000-0001-8855-0370
dc.gnosis.orcid0000-0002-2335-3584


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