View in EDS

The role of crystalline phase in triblock copolymer PS–PEG–PS based gas sensing materials

Saved in:
Bibliographic Details
Title: The role of crystalline phase in triblock copolymer PS–PEG–PS based gas sensing materials
Authors: Li, Jun Rong1, Xu, Jia Rui1, Zhang, Ming Qiu1 ceszmq@zsu.edu.cn, Rong, Min Zhi1, Zheng, Qiang2
Source: Polymer. Nov2005, Vol. 46 Issue 24, p11051-11059. 9p.
Subjects: Crystalline polymers, Copolymers, Composite materials, Chemical reactions, Physical & theoretical chemistry
Abstract: Abstract: To reveal the role of crystalline phase in the matrix polymer of gas sensing conductive polymer composite materials, a series of triblock copolymer polystyrene-b-poly(ethylene glycol)-b-polystyrene (PS–PEG–PS) was synthesized by atom transfer radical polymerization (ATRP). The copolymers have similar molecular weights but different fractions of the crystalline PEG segments. As a result, the ratio of the crystalline phase to the amorphous one can be tuned regardless of the molecular weight of the entire copolymer. The composites consisting of the copolymer and carbon black exhibit gas sensing ability as characterized by the drastic increase in the electrical resistance when meeting organic solvent vapors. It is found that matrix swelling, which provides the composites with gas sensitivity, results from the contribution of the amorphous phase. The crystalline portions prove to be unchanged in the vapors with respect to their microstructure within the time of interests. The appearance of the crystalline phase in the matrix polymer helps to push the conductive fillers into the amorphous regions, which increases the effective filler content and leads to higher responsivity to solvent vapors at lower filler loading. [Copyright &y& Elsevier]
Copyright of Polymer is the property of Elsevier B.V. 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: 18966006
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: The role of crystalline phase in triblock copolymer PS–PEG–PS based gas sensing materials
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Li%2C+Jun+Rong%22">Li, Jun Rong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Xu%2C+Jia+Rui%22">Xu, Jia Rui</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Ming+Qiu%22">Zhang, Ming Qiu</searchLink><relatesTo>1</relatesTo><i> ceszmq@zsu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Rong%2C+Min+Zhi%22">Rong, Min Zhi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Qiang%22">Zheng, Qiang</searchLink><relatesTo>2</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Nov2005, Vol. 46 Issue 24, p11051-11059. 9p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Crystalline+polymers%22">Crystalline polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Copolymers%22">Copolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+%26+theoretical+chemistry%22">Physical & theoretical chemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: To reveal the role of crystalline phase in the matrix polymer of gas sensing conductive polymer composite materials, a series of triblock copolymer polystyrene-b-poly(ethylene glycol)-b-polystyrene (PS–PEG–PS) was synthesized by atom transfer radical polymerization (ATRP). The copolymers have similar molecular weights but different fractions of the crystalline PEG segments. As a result, the ratio of the crystalline phase to the amorphous one can be tuned regardless of the molecular weight of the entire copolymer. The composites consisting of the copolymer and carbon black exhibit gas sensing ability as characterized by the drastic increase in the electrical resistance when meeting organic solvent vapors. It is found that matrix swelling, which provides the composites with gas sensitivity, results from the contribution of the amorphous phase. The crystalline portions prove to be unchanged in the vapors with respect to their microstructure within the time of interests. The appearance of the crystalline phase in the matrix polymer helps to push the conductive fillers into the amorphous regions, which increases the effective filler content and leads to higher responsivity to solvent vapors at lower filler loading. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymer is the property of Elsevier B.V. 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=18966006
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.polymer.2005.09.047
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 9
        StartPage: 11051
    Subjects:
      – SubjectFull: Crystalline polymers
        Type: general
      – SubjectFull: Copolymers
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Chemical reactions
        Type: general
      – SubjectFull: Physical & theoretical chemistry
        Type: general
    Titles:
      – TitleFull: The role of crystalline phase in triblock copolymer PS–PEG–PS based gas sensing materials
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Li, Jun Rong
      – PersonEntity:
          Name:
            NameFull: Xu, Jia Rui
      – PersonEntity:
          Name:
            NameFull: Zhang, Ming Qiu
      – PersonEntity:
          Name:
            NameFull: Rong, Min Zhi
      – PersonEntity:
          Name:
            NameFull: Zheng, Qiang
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 21
              M: 11
              Text: Nov2005
              Type: published
              Y: 2005
          Identifiers:
            – Type: issn-print
              Value: 00323861
          Numbering:
            – Type: volume
              Value: 46
            – Type: issue
              Value: 24
          Titles:
            – TitleFull: Polymer
              Type: main
ResultId 1