Well-defined 4-arm stars with hydroxy-terminated polyethylene, polyethylene-b-polycaprolactone and polyethylene-b-(polymethyl methacrylate) 2 arms

Handle URI:
http://hdl.handle.net/10754/621691
Title:
Well-defined 4-arm stars with hydroxy-terminated polyethylene, polyethylene-b-polycaprolactone and polyethylene-b-(polymethyl methacrylate) 2 arms
Authors:
Zhang, Zhen; Gnanou, Yves ( 0000-0001-6253-7856 ) ; Hadjichristidis, Nikolaos ( 0000-0003-1442-1714 )
Abstract:
Bis-boron-thexyl-silaboracycle was prepared by hydroboration of 1,4-bis(methyldivinylsilyl)butane with thexylborane and used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined hydroxy-terminated 4-arm polyethylene (PE) stars. The synthesized PE stars were transformed to (PE-b-PCL)4 starblock copolymers via the ring-opening polymerization of ϵ-caprolactone (CL) initiated by the hydroxyl end groups of (PE-OH)4 in the presence of P2-tBu phosphazene base. Esterification of the hydroxyl groups of the OH-terminated PE star with 2,2-dichloroacetyl chloride led to (PE-Cl2)4 which was used as initiator (eight initiating atom transfer radical polymerization, ATRP, sites) for the synthesis of (PE-b-PMMA2)4 dendrimer-like stars by the ATRP of methyl methacrylate (MMA). All intermediates and final products were characterized by high temperature gel permeation chromatography and proton nuclear magnetic resonance spectroscopy. © 2016 The Royal Society of Chemistry.
KAUST Department:
KAUST Catalysis Center (KCC); Physical Sciences and Engineering (PSE) Division; Polymer Synthesis Laboratory
Citation:
Zhang Z, Gnanou Y, Hadjichristidis N (2016) Well-defined 4-arm stars with hydroxy-terminated polyethylene, polyethylene-b-polycaprolactone and polyethylene-b-(polymethyl methacrylate) 2 arms . Polym Chem 7: 5507–5511. Available: http://dx.doi.org/10.1039/c6py01090c.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Polym. Chem.
Issue Date:
20-Jul-2016
DOI:
10.1039/c6py01090c
Type:
Article
ISSN:
1759-9954; 1759-9962
Sponsors:
Research reported in this publication was supported by the King Abdullah University of Science and Technology.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Zhenen
dc.contributor.authorGnanou, Yvesen
dc.contributor.authorHadjichristidis, Nikolaosen
dc.date.accessioned2016-11-03T13:22:51Z-
dc.date.available2016-11-03T13:22:51Z-
dc.date.issued2016-07-20en
dc.identifier.citationZhang Z, Gnanou Y, Hadjichristidis N (2016) Well-defined 4-arm stars with hydroxy-terminated polyethylene, polyethylene-b-polycaprolactone and polyethylene-b-(polymethyl methacrylate) 2 arms . Polym Chem 7: 5507–5511. Available: http://dx.doi.org/10.1039/c6py01090c.en
dc.identifier.issn1759-9954en
dc.identifier.issn1759-9962en
dc.identifier.doi10.1039/c6py01090cen
dc.identifier.urihttp://hdl.handle.net/10754/621691-
dc.description.abstractBis-boron-thexyl-silaboracycle was prepared by hydroboration of 1,4-bis(methyldivinylsilyl)butane with thexylborane and used to initiate the polyhomologation of dimethylsulfoxonium methylide to afford well-defined hydroxy-terminated 4-arm polyethylene (PE) stars. The synthesized PE stars were transformed to (PE-b-PCL)4 starblock copolymers via the ring-opening polymerization of ϵ-caprolactone (CL) initiated by the hydroxyl end groups of (PE-OH)4 in the presence of P2-tBu phosphazene base. Esterification of the hydroxyl groups of the OH-terminated PE star with 2,2-dichloroacetyl chloride led to (PE-Cl2)4 which was used as initiator (eight initiating atom transfer radical polymerization, ATRP, sites) for the synthesis of (PE-b-PMMA2)4 dendrimer-like stars by the ATRP of methyl methacrylate (MMA). All intermediates and final products were characterized by high temperature gel permeation chromatography and proton nuclear magnetic resonance spectroscopy. © 2016 The Royal Society of Chemistry.en
dc.description.sponsorshipResearch reported in this publication was supported by the King Abdullah University of Science and Technology.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleWell-defined 4-arm stars with hydroxy-terminated polyethylene, polyethylene-b-polycaprolactone and polyethylene-b-(polymethyl methacrylate) 2 armsen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentPolymer Synthesis Laboratoryen
dc.identifier.journalPolym. Chem.en
kaust.authorZhang, Zhenen
kaust.authorGnanou, Yvesen
kaust.authorHadjichristidis, Nikolaosen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.