Synthesis and characterization of ABA-Type triblock copolymers using novel bifunctional PS, PMMA, and PCL macroinitiators bearing p-xylene-bis(2-mercaptoethyloxy) core

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buir.contributor.authorSavaşkan Yılmaz, Sevil
buir.contributor.orcidSavaşkan Yılmaz, Sevil|0000-0002-1055-7799
dc.citation.epage3813-25en_US
dc.citation.issueNumber18
dc.citation.spage3813-1
dc.citation.volumeNumber15
dc.contributor.authorMısır, M.
dc.contributor.authorSavaşkan Yılmaz, Sevil
dc.contributor.authorBilgin, A.
dc.date.accessioned2024-03-14T10:21:06Z
dc.date.available2024-03-14T10:21:06Z
dc.date.issued2023-09-18
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)
dc.description.abstractSyntheses of novel bifunctional poly(methyl methacrylate) (PMMA)-, poly(styrene) (PS)-, and (poly ε-caprolactone) (PCL)-based atom transfer radical polymerization (ATRP) macroinitiators derived from p-xylene-bis(1-hydroxy-3-thia-propanoloxy) core were carried out to obtain ABA-type block copolymers. Firstly, a novel bifunctional ATRP initiator, 1,4-phenylenebis(methylene-thioethane-2,1-diyl)bis(2-bromo-2-methylpropanoat) (PXTBR), synthesized the reaction of p-xylene-bis(1-hydroxy-3-thia-propane) (PXTOH) with α-bromoisobutryl bromide. The PMMA and PS macroinitiators were prepared by ATRP of methyl methacrylate (MMA) and styrene (S) as monomers using (PXTBR) as the initiator and copper(I) bromide/N,N,N′,N″,N″-pentamethyldiethylenetriamine (CuBr/PMDETA) as a catalyst system. Secondly, di(α-bromoester) end-functionalized PCL–based ATRP macronitiator (PXTPCLBr) was prepared by esterification of hydroxyl end groups of PCL-diol (PXTPCLOH) synthesized by Sn(Oct)2–catalyzed ring opening polymerization (ROP) of ε-CL in bulk using (PXTOH) as initiator. Finally, ABA-type block copolymers, PXT(PS-b-PMMA-b-PS), PXT(PMMA-b-PS-b-PMMA), PXT(PS-b-PCL-b-PS), and PXT(PMMA-b-PCL-b-PMMA), were synthesized by ATRP of MMA and S as monomers using PMMA-, PS-, and PCL-based macroinitiators in the presence of CuBr/PMDETA as the catalyst system in toluene or N,N-dimethylformamide (DMF) at different temperatures. In addition, the extraction abilities of PCL and PS were investigated under liquid–liquid phase conditions using heavy metal picrates (Ag+, Cd2+, Cu2+, Hg2+, Pb2+, and Zn2+) as substrates and measuring with UV-Vis the amounts of picrate in the 1,2–dichloroethane phase before and after treatment with the polymers. The extraction affinity of PXTPCL and PXTPS for Hg2+ was found to be highest in the liquid–liquid phase extraction experiments. Characterizations of the molecular structures for synthesized novel initiators, macroinitiators, and the block copolymers were made by spectroscopic (FT–IR, ESI–MS, 1H NMR, 13C NMR), DSC, TGA, chromatographic (GPC), and morphologic SEM.
dc.description.provenanceMade available in DSpace on 2024-03-14T10:21:06Z (GMT). No. of bitstreams: 1 Synthesis_and_Characterization_of_ABA-Type_Triblock_Copolymers_Using_Novel_Bifunctional_PS,_PMMA,_and_PCL_Macroinitiators_Bearing_p-xylene-bis(2-mercaptoethyloxy)_Core.pdf: 4683075 bytes, checksum: 72ef0687348d8cfe5f68d0bbaef7061c (MD5) Previous issue date: 2023-09-18en
dc.identifier.doi10.3390/polym15183813
dc.identifier.eissn2073-4360
dc.identifier.urihttps://hdl.handle.net/11693/114736
dc.language.isoen
dc.publisherMDPI AG
dc.relation.isversionofhttps://dx.doi.org/10.3390/polym15183813
dc.rightsCC BY 4.0 DEED (Attribution 4.0 International)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.source.titlePolymers
dc.subjectABA–type triblock copolymer
dc.subjectAtom-transfer radical polymerization
dc.subjectHeavy metal extraction
dc.subjectRing-opening polymerization
dc.subjectThe novel bi-functional atrp and rop initiator
dc.titleSynthesis and characterization of ABA-Type triblock copolymers using novel bifunctional PS, PMMA, and PCL macroinitiators bearing p-xylene-bis(2-mercaptoethyloxy) core
dc.typeArticle

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