Ecofriendly Autoxidation of Castor Oil/Ricinoleic Acid. Multifunctional Macroperoxide Initiators for Multi Block/Graft Copolymers

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dc.contributor.authorEren, Melike
dc.contributor.authorHazer, Baki
dc.date.accessioned2020-05-21T01:27:36Z
dc.date.available2020-05-21T01:27:36Z
dc.date.issued2019
dc.departmentKapadokya Ɯniversitesi, Uygulamalı Bilimler YĆ¼ksekokulu, UƧak Gƶvde ve Motor Bakım BƶlĆ¼mĆ¼
dc.descriptionTARAMASCOPUS
dc.descriptionTARAMAWOS
dc.description.abstractEcofriendly autoxidation is a reaction of air oxygen with unsaturated organic molecules at room temperature. Castor oil and ricinoleic acid were ecofriendly autoxidized for 5 months to obtain castor oil macroperoxide with a Mn of 1935 g mol(-1) (Pcast5m) and the ricinoleic acid macroperoxide initiator (Prici5m) with a Mn of 1169 g mol(-1). Peroxide groups thermally initiated the free radical polymerization of methyl methacrylate (MMA), n-butyl methacrylate (nBMA), and styrene (S). Peroxide formation in the oxidized castor oil and ricinoleic acid was confirmed using iodometric analysis, elemental analysis, and differential scanning calorimetry technique. Peroxide decomposition in both macroperoxide initiators was observed at 166 degrees C for Prici5m and 170 degrees C for Pcast5m. Hydroxyl groups of Pcast5m were reacted with methacryloyl chloride to obtain methacrylated castor oil macroperoxide (PcastMA). The polymerization rates of the obtained macroinitiators were compared. The polymerization rate order is Pcast5m > Prici5m > PcastMA. Polymerization of styrene by PcastMA resulted in an increase in molar masses and an increase in the polymerization time while those of the styrene polymerization by Pcast5m and Prici5m remained constant. Carboxylic acid groups were reacted with amine-terminated polyethylene glycol (PEG), polydimethyl siloxane (PDMS), and polytetrahydrofuran (PTHF) while the hydroxyl functionality initiated the ring-opening polymerization of epsilon-caprolactone (CL). Prici-PEG-PMMA, Prici-PS-PDMS, Prici-PS-PTHF, Pcast-PS-PCL, Pcast-PCL-PMMA, and Pcast-PS-PnBMA multiblock copolymers were prepared and characterized using spectrometric, thermal, and stress-strain measurement techniques.
dc.description.sponsorshipBulent Ecevit University Research Funds [BEU-2017-72118496-01, BEU - 2016 - 72118496 - 10]
dc.description.sponsorshipThis work was supported by the Bulent Ecevit University Research Funds (#BEU-2017-72118496-01 and #BEU - 2016 - 72118496 - 10). The Authors thank Serdar Coban and Sidika Sarac Tabakli (Cilas Kaucuk, Devrek, Zonguldak, Turkey) for stress-strain measurements. Finally, the Authors thank Yucel Mercimek for his technical support.
dc.identifier.doi10.1002/aocs.12186
dc.identifier.endpage432en_US
dc.identifier.issn0003-021X
dc.identifier.issn1558-9331
dc.identifier.issue4en_US
dc.identifier.scopusqualityQ2
dc.identifier.startpage421en_US
dc.identifier.urihttps://doi.org/10.1002/aocs.12186
dc.identifier.urihttps://hdl.handle.net/20.500.12695/32
dc.identifier.volume96en_US
dc.identifier.wosWOS:000463024300006
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Sceince
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley
dc.relation.ispartofJournal Of The American Oil Chemists Society
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Ɩğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectEcofriendly autoxidation
dc.subjectRicinoleic acid
dc.subjectCastor oil
dc.subjectMultiblock copolymer
dc.subjectRing-opening polymerization
dc.titleEcofriendly Autoxidation of Castor Oil/Ricinoleic Acid. Multifunctional Macroperoxide Initiators for Multi Block/Graft Copolymers
dc.typeArticle

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