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A novel strategy for the synthesis of amphiphilic and thermoresponsive Poly(N-isopropylacrylamide)- b-polystyrene block copolymers via ATRP

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dc.abstract.enA new synthetic approach is presented for the preparation of Poly(N-isopropylacrylamideblock- styrene) PNIPAM-b-PS via an Atom Transfer Radical Polymerization (ATRP) technique. The proposed method is based on application of 2-chloro-N-(2-hydroxyethyl)propanamide (NCPAE) as a bifunctional initiator, which enables ATRP of two monomers, differing in activity and polarity, into two stages. The synthesized copolymer molecules contain two well-defined polymer chains connected by a linker, which is a derivative of the proposed initiator. Using NCPAE led to PNIPAMs with well-planned molecular weight, low polydispersities (PDI=1.1÷1.3) and hydroxyl functionality. Activation of such blocks for initiation of styrene polymerization was performed using α-bromoisobutyryl bromide. After such a modification, the synthesized homopolymers acted as macroinitiators in ARGET ATRP and a well-defined polystyrene block, as the next one in the polymer chain was successfully formed. Both of the synthesized macromolecules, PNIPAM and PNIPAM-b-PS, exhibit a thermoresponsive behavior with explicit lower critical solution temperatures (LCST) in their aqueous solutions. The synthesized homopolymers and subsequently derived block copolymers were characterized using Size-Exclusion Chromatography, Differential Scanning Calorimetry, Dynamic Light Scattering, and NMR spectroscopy.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMegiel, Elżbieta
dc.contributor.authorKrzywicka, Anna
dc.contributor.authorFedorczyk, Magdalena
dc.contributor.authorRomański, Jan
dc.contributor.authorCieciórski, Piotr
dc.date.accessioned2024-01-24T18:04:43Z
dc.date.available2024-01-24T18:04:43Z
dc.date.copyright2019-09-11
dc.date.issued2019
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number9
dc.description.versionFINAL_PUBLISHED
dc.description.volume11
dc.identifier.doi10.3390/POLYM11091484
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101768
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofPolymers
dc.relation.pagesart.no. 1484
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enATRP
dc.subject.enControlled radical polymerization
dc.subject.enQuasiliving polymerization
dc.subject.enSmart materials
dc.subject.enThermoresponsive polymers
dc.titleA novel strategy for the synthesis of amphiphilic and thermoresponsive Poly(N-isopropylacrylamide)- b-polystyrene block copolymers via ATRP
dc.typeJournalArticle
dspace.entity.typePublication