Hyperbranched homo and thermoresponsive graft copolymers by using ATRP-macromonomer initiators

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dc.contributor.authorAllı, Sema
dc.contributor.authorAllı, Abdulkadir
dc.contributor.authorHazer, Baki
dc.date.accessioned2020-05-01T12:10:26Z
dc.date.available2020-05-01T12:10:26Z
dc.date.issued2012
dc.departmentDÜ, Fen-Edebiyat Fakültesi, Kimya Bölümüen_US
dc.descriptionWOS: 000298637300063en_US
dc.description.abstractMacromonomer initiators behave as macro cross-linkers, macro initiators, and macromonomers to obtain branched and cross-linked block/graft copolymers. A series of new macromonomer initiators for atom transfer radical polymerization (MIM-ATRP) based on polyethylene glycol (M-n = 495D, 2203D, and 4203D) (PEG) were synthesized by the reaction of the hydroxyl end of mono-methacryloyl polyethylene glycol with 2-bromo propanoyl chloride, leading to methacryloyl polyethylene glycol 2-bromo propanoyl ester. Poly (ethylene glycol) functionalized with methacrylate at one end was reacted with 2-bromopropionyl chloride to form a macromonomeric initiator for ATRP. ATRP was found to be a more controllable polymerization method than conventional free radical polymerization in view of fewer cross-linked polymers and highly branched polymers produced from macromonomer initiators as well. In another scenario, ATRP of N-isopropylacrylamide (NIPAM) was initiated by MIM-ATRP to obtain PEG-b-PNIPAM branched block/graft copolymers. Thermal analysis, FTIR, H-1 NMR, TEM, and SEM techniques were used in the characterization of the products. They had a thermo-responsive character and exhibited volume phase transition at similar to 36 degrees C. A plasticizer effect of PEG in graft copolymers was also observed, indicating a lower glass transition temperature than that of pure PNIPAM. Homo and copolymerization kinetics were also evaluated. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012en_US
dc.description.sponsorshipTurkish Scientific Research CouncilTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109T029, 108T423, 110T884]; Zonguldak Karaelmas UniversityBulent Ecevit University [2008-70-01-01]; Duzce UniversityDuzce Universityen_US
dc.description.sponsorshipContract grant sponsor: Turkish Scientific Research Council; contract grant numbers: 109T029, 108T423, 110T884.; Contract grant sponsor: Zonguldak Karaelmas University Research Fund; contract grant number: 2008-70-01-01.; Contract grant sponsor: Duzce University Research Fund.en_US
dc.identifier.doi10.1002/app.34933en_US
dc.identifier.endpage548en_US
dc.identifier.issn0021-8995
dc.identifier.issn1097-4628
dc.identifier.issue1en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage536en_US
dc.identifier.urihttps://doi.org/10.1002/app.34933
dc.identifier.urihttps://hdl.handle.net/20.500.12684/6199
dc.identifier.volume124en_US
dc.identifier.wosWOS:000298637300063en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofJournal Of Applied Polymer Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectatom transfer radical polymerization (ATRP)en_US
dc.subjectgraft copolymersen_US
dc.subjecthyperbrancheden_US
dc.subjectstimuli-sensitive polymersen_US
dc.titleHyperbranched homo and thermoresponsive graft copolymers by using ATRP-macromonomer initiatorsen_US
dc.typeArticleen_US

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