Synthesis and characterization of star-shaped block copolymers composed of poly(3-hydroxy octanoate) and styrene via RAFT polymerization

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dc.contributor.authorAllı, Abdulkadir
dc.contributor.authorAllı, Sema
dc.contributor.authorHazer, Baki
dc.contributor.authorZinn, Manfred
dc.date.accessioned2023-07-26T11:54:49Z
dc.date.available2023-07-26T11:54:49Z
dc.date.issued2022
dc.departmentDÜ, Fen-Edebiyat Fakültesi, Kimya Bölümüen_US
dc.description.abstractThis study investigated a macro reversible addition fraction chain transfer (RAFT) agent based on three-arm hydroxylated star-shaped poly(3-hydroxy octanoate). The utilization of this star-shaped poly(3-hydroxy octanoate) macro-RAFT agent in the RAFT process resulted in efficient control in the preparation of star-shaped block styrene copolymers. Poly(3-hydroxy octanoate) (PHO) was reacted with diethanol amine (DEA) in order to obtain three-arm hydroxylated poly(3-hydroxy octanoate) (PHO-DEA). A carboxylic acid-functionalized RAFT agent (2-(dodecylthiocarbonothioylthio)-2-methylpropionic acid) was reacted with the PHO-DEA in order to obtain a star-shaped PHO macro-RAFT agent (PHO-R2). A series of AB(3) type PHO-polystyrene (PHO-PS) star-shaped block copolymers were obtained via the polymerization of styrene (S) using the PHO-R2 in toluene at 80 degrees C. The RAFT polymerization was seen to obey the polymerization kinetics of controlled free radical polymerization. The plasticizing effect of the PHO soft segments was influenced by the glass transition temperature (Tg) of polystyrene. This was clearly observed in the block copolymers. Moreover, it was clear that this plasticizing effect disappeared in the block copolymers as a result of the increase in polymerization time. The molar masses of the obtained copolymers increased in parallel with increases in the polymerization time. Structural, physiochemical, and thermal characterization of the obtained products was carried out using size-exclusion chromatography (SEC), proton nuclear magnetic resonance (H-1 NMR), differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA) techniques. The polymerization kinetics of the star-shaped block copolymers were also investigated in detail.en_US
dc.description.sponsorshipKapadokya University Research Funds [K_UN.2020-BAGP-001]en_US
dc.description.sponsorshipThis work was supported by the Kapadokya University Research Funds (#K_UN.2020-BAGP-001).en_US
dc.identifier.doi10.1080/10601325.2022.2092408
dc.identifier.endpage536en_US
dc.identifier.issn1060-1325
dc.identifier.issn1520-5738
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85133246384en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage526en_US
dc.identifier.urihttps://doi.org/10.1080/10601325.2022.2092408
dc.identifier.urihttps://hdl.handle.net/20.500.12684/12932
dc.identifier.volume59en_US
dc.identifier.wosWOS:000819539200001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAllı, Abdulkadir
dc.institutionauthorAllı, Sema
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofJournal of Macromolecular Science Part A-Pure and Applied Chemistryen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz$2023V1Guncelleme$en_US
dc.subjectPoly(3-Hydroxy Octanoate); Macro Raft Agent; Three Hydroxylated Pho; Pho-Ps Star-Shaped Block Copolymers; Biomaterialsen_US
dc.subjectChemical-Modification; Bacterial Polyesters; Triblock Copolymers; Polyhydroxyalkanoates; Biosynthesis; Elastomers; Chemistry; Polymers; Micellization; Polystyreneen_US
dc.titleSynthesis and characterization of star-shaped block copolymers composed of poly(3-hydroxy octanoate) and styrene via RAFT polymerizationen_US
dc.typeArticleen_US

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