Well-Defined Polyethylene-Based Random, Block, and Bilayered Molecular Cobrushes

Handle URI:
http://hdl.handle.net/10754/564187
Title:
Well-Defined Polyethylene-Based Random, Block, and Bilayered Molecular Cobrushes
Authors:
Zhang, Hefeng; Zhang, Zhen; Gnanou, Yves ( 0000-0001-6253-7856 ) ; Hadjichristidis, Nikolaos ( 0000-0003-1442-1714 )
Abstract:
Novel well-defined polyethylene-based random, block, and bilayered molecular cobrushes were synthesized through the macromonomer strategy. Two steps were involved in this approach: (i) synthesis of norbornyl-terminated macromonomers of polyethylene (PE), polycaprolactone (PCL), poly(ethylene oxide) (PEO), and polystyrene (PS), as well as polyethylene-b-polycaprolactone (PE-b-PCL), by esterification of the hydroxyl-terminated precursors (PE, PCL, PEO, PS, and PE-b-PCL) with 5-norbornene-2-carboxylic acid and (ii) ring-opening metathesis (co)polymerization of the resulting macromonomers to afford the PE-based molecular cobrushes. The PE-macromonomers were synthesized by polyhomologation of dimethylsulfoxonium methylide, while the others by anionic polymerization. Proton nuclear magnetic resonance spectroscopy (1H NMR) and high-temperature gel permeation chromatography (HT-GPC) were used to imprint the molecular characteristics of all macromonomers and molecular brushes and differential scanning calorimetry (DSC) for the thermal properties. The bilayered molecular cobrushes of P(PE-b-PCL) adopt a wormlike morphology on silica wafer as visualized by atomic force microscopy (AFM). © 2015 American Chemical Society.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Polymer Synthesis Laboratory; Chemical Science Program
Publisher:
American Chemical Society (ACS)
Journal:
Macromolecules
Issue Date:
9-Jun-2015
DOI:
10.1021/acs.macromol.5b00713
Type:
Article
ISSN:
00249297
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Hefengen
dc.contributor.authorZhang, Zhenen
dc.contributor.authorGnanou, Yvesen
dc.contributor.authorHadjichristidis, Nikolaosen
dc.date.accessioned2015-08-03T12:35:38Zen
dc.date.available2015-08-03T12:35:38Zen
dc.date.issued2015-06-09en
dc.identifier.issn00249297en
dc.identifier.doi10.1021/acs.macromol.5b00713en
dc.identifier.urihttp://hdl.handle.net/10754/564187en
dc.description.abstractNovel well-defined polyethylene-based random, block, and bilayered molecular cobrushes were synthesized through the macromonomer strategy. Two steps were involved in this approach: (i) synthesis of norbornyl-terminated macromonomers of polyethylene (PE), polycaprolactone (PCL), poly(ethylene oxide) (PEO), and polystyrene (PS), as well as polyethylene-b-polycaprolactone (PE-b-PCL), by esterification of the hydroxyl-terminated precursors (PE, PCL, PEO, PS, and PE-b-PCL) with 5-norbornene-2-carboxylic acid and (ii) ring-opening metathesis (co)polymerization of the resulting macromonomers to afford the PE-based molecular cobrushes. The PE-macromonomers were synthesized by polyhomologation of dimethylsulfoxonium methylide, while the others by anionic polymerization. Proton nuclear magnetic resonance spectroscopy (1H NMR) and high-temperature gel permeation chromatography (HT-GPC) were used to imprint the molecular characteristics of all macromonomers and molecular brushes and differential scanning calorimetry (DSC) for the thermal properties. The bilayered molecular cobrushes of P(PE-b-PCL) adopt a wormlike morphology on silica wafer as visualized by atomic force microscopy (AFM). © 2015 American Chemical Society.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleWell-Defined Polyethylene-Based Random, Block, and Bilayered Molecular Cobrushesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentPolymer Synthesis Laboratoryen
dc.contributor.departmentChemical Science Programen
dc.identifier.journalMacromoleculesen
kaust.authorZhang, Hefengen
kaust.authorGnanou, Yvesen
kaust.authorHadjichristidis, Nikolaosen
kaust.authorZhang, Zhenen
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