View in EDS

Synthesis of Surface-Initiated Stimuli-Responsive Diblock Copolymer Brushes Utilizing a Combination of ATRP and RAFT Polymerization Techniques.

Saved in:
Bibliographic Details
Title: Synthesis of Surface-Initiated Stimuli-Responsive Diblock Copolymer Brushes Utilizing a Combination of ATRP and RAFT Polymerization Techniques.
Authors: Misty D. Rowe, Brenton A. G. Hammer, Stephen G. Boyes
Source: Macromolecules. May2008, Vol. 41 Issue 12, p4147-4157. 11p.
Subjects: Copolymers, Polymerization, Chemical reactions, Spectrum analysis
Abstract: The synthesis of diblock copolymer brushes, including poly(styrene) (PSty)- b-PSty, PSty- b-poly(acrylic acid), PSty- b-poly( N-isopropylacrylamide), and poly(methyl acrylate)- b-poly( N,N-(dimethylamino)ethyl acrylate), was achieved utilizing a combination of surface-mediated atom transfer radical polymerization (ATRP) and reversible addition−fragmentation chain transfer (RAFT) polymerization techniques. Conversion of bromine end groups of homopolymer brushes formed by ATRP via a modified atom transfer addition reaction to a RAFT agent and diblock extension via RAFT polymerization allowed the direct formation of well-defined stimuli-responsive diblock copolymer brushes. The addition of sacrificial initiator and/or chain transfer agent permitted formation of well-defined diblock copolymer brushes and free polymer chains in solution. The free polymer chains were isolated and used to estimate the molecular weights and polydispersity index of chains attached to the surface. Ellipsometry, contact angle measurements, grazing angle attenuated total reflectance−Fourier transform infrared spectroscopy, and wide-scan X-ray photoelectron spectroscopy (XPS) were used to characterize initiator deposition, homopolymer brush formation via ATRP, conversion to macro-RAFT agent, and diblock copolymer brush formation via RAFT polymerization. Selective solvent treatment demonstrated the stimuli-responsive nature of the diblock copolymer brushes via changes in the water contact angles and wide-scan XPS atomic percentages. [ABSTRACT FROM AUTHOR]
Copyright of Macromolecules is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 33050924
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Synthesis of Surface-Initiated Stimuli-Responsive Diblock Copolymer Brushes Utilizing a Combination of ATRP and RAFT Polymerization Techniques.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Misty+D%2E+Rowe%22">Misty D. Rowe</searchLink><br /><searchLink fieldCode="AR" term="%22Brenton+A%2E+G%2E+Hammer%22">Brenton A. G. Hammer</searchLink><br /><searchLink fieldCode="AR" term="%22Stephen+G%2E+Boyes%22">Stephen G. Boyes</searchLink>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Macromolecules%22">Macromolecules</searchLink>. May2008, Vol. 41 Issue 12, p4147-4157. 11p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Copolymers%22">Copolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerization%22">Polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The synthesis of diblock copolymer brushes, including poly(styrene) (PSty)- b-PSty, PSty- b-poly(acrylic acid), PSty- b-poly( N-isopropylacrylamide), and poly(methyl acrylate)- b-poly( N,N-(dimethylamino)ethyl acrylate), was achieved utilizing a combination of surface-mediated atom transfer radical polymerization (ATRP) and reversible addition−fragmentation chain transfer (RAFT) polymerization techniques. Conversion of bromine end groups of homopolymer brushes formed by ATRP via a modified atom transfer addition reaction to a RAFT agent and diblock extension via RAFT polymerization allowed the direct formation of well-defined stimuli-responsive diblock copolymer brushes. The addition of sacrificial initiator and/or chain transfer agent permitted formation of well-defined diblock copolymer brushes and free polymer chains in solution. The free polymer chains were isolated and used to estimate the molecular weights and polydispersity index of chains attached to the surface. Ellipsometry, contact angle measurements, grazing angle attenuated total reflectance−Fourier transform infrared spectroscopy, and wide-scan X-ray photoelectron spectroscopy (XPS) were used to characterize initiator deposition, homopolymer brush formation via ATRP, conversion to macro-RAFT agent, and diblock copolymer brush formation via RAFT polymerization. Selective solvent treatment demonstrated the stimuli-responsive nature of the diblock copolymer brushes via changes in the water contact angles and wide-scan XPS atomic percentages. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Macromolecules is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=33050924
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1021/ma800154c
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 4147
    Subjects:
      – SubjectFull: Copolymers
        Type: general
      – SubjectFull: Polymerization
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
      – SubjectFull: Spectrum analysis
        Type: general
    Titles:
      – TitleFull: Synthesis of Surface-Initiated Stimuli-Responsive Diblock Copolymer Brushes Utilizing a Combination of ATRP and RAFT Polymerization Techniques.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Misty D. Rowe
      – PersonEntity:
          Name:
            NameFull: Brenton A. G. Hammer
      – PersonEntity:
          Name:
            NameFull: Stephen G. Boyes
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 20
              M: 05
              Text: May2008
              Type: published
              Y: 2008
          Identifiers:
            – Type: issn-print
              Value: 00249297
          Numbering:
            – Type: volume
              Value: 41
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Macromolecules
              Type: main
ResultId 1