View in EDS

Filler aggregation as a reinforcement mechanism in polymer nanocomposites.

Saved in:
Bibliographic Details
Title: Filler aggregation as a reinforcement mechanism in polymer nanocomposites.
Authors: Dorigato, Andrea1, Dzenis, Yuris2 ydzenis@unl.edu, Pegoretti, Alessandro1 alessandro.pegoretti@unitn.it
Source: Mechanics of Materials. Jul2013, Vol. 61, p79-90. 12p.
Subjects: Polymeric nanocomposites, Fibrous composites, Low density polyethylene, Nanocomposite materials, Agglomerates (Chemistry)
Abstract: Abstract: Significant reinforcing effects that are often observed in polymer nanoparticulate composites are usually attributed to strong interfacial interactions over extended interfaces in these systems. Here, we study linear low density polyethylene (LLDPE) reinforced with 1–4% fumed silica nanoparticles. Nanocomposite modulus, evaluated as a function of filler volume fraction, significantly exceeds classical micromechanics predictions. Possible reasons for the observed discrepancy are evaluated experimentally and theoretically. It is concluded that primary nanoparticle aggregation rather than polymer–nanoparticle interaction at the interface is mainly responsible for the observed reinforcement effect. A simple micromechanics-informed model of a composite with primary particle aggregates is presented based on the model of secondary aggregation developed earlier. The model is shown capable of predicting nanocomposites behavior by introducing a single new structural parameter with a straightforward physical interpretation. As nanoparticles are prone to agglomerate, their primary or secondary aggregates may be present in many nanocomposite systems and the aggregation state and its effects need to be thoroughly evaluated, along with the classical interfacial interactions. The described reinforcing mechanism may be responsible for other anomalous property changes in nanoparticulate composites reported in the literature. [Copyright &y& Elsevier]
Copyright of Mechanics of Materials 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: 89192294
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Filler aggregation as a reinforcement mechanism in polymer nanocomposites.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Dorigato%2C+Andrea%22">Dorigato, Andrea</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dzenis%2C+Yuris%22">Dzenis, Yuris</searchLink><relatesTo>2</relatesTo><i> ydzenis@unl.edu</i><br /><searchLink fieldCode="AR" term="%22Pegoretti%2C+Alessandro%22">Pegoretti, Alessandro</searchLink><relatesTo>1</relatesTo><i> alessandro.pegoretti@unitn.it</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Mechanics+of+Materials%22">Mechanics of Materials</searchLink>. Jul2013, Vol. 61, p79-90. 12p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Polymeric+nanocomposites%22">Polymeric nanocomposites</searchLink><br /><searchLink fieldCode="DE" term="%22Fibrous+composites%22">Fibrous composites</searchLink><br /><searchLink fieldCode="DE" term="%22Low+density+polyethylene%22">Low density polyethylene</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Agglomerates+%28Chemistry%29%22">Agglomerates (Chemistry)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Significant reinforcing effects that are often observed in polymer nanoparticulate composites are usually attributed to strong interfacial interactions over extended interfaces in these systems. Here, we study linear low density polyethylene (LLDPE) reinforced with 1–4% fumed silica nanoparticles. Nanocomposite modulus, evaluated as a function of filler volume fraction, significantly exceeds classical micromechanics predictions. Possible reasons for the observed discrepancy are evaluated experimentally and theoretically. It is concluded that primary nanoparticle aggregation rather than polymer–nanoparticle interaction at the interface is mainly responsible for the observed reinforcement effect. A simple micromechanics-informed model of a composite with primary particle aggregates is presented based on the model of secondary aggregation developed earlier. The model is shown capable of predicting nanocomposites behavior by introducing a single new structural parameter with a straightforward physical interpretation. As nanoparticles are prone to agglomerate, their primary or secondary aggregates may be present in many nanocomposite systems and the aggregation state and its effects need to be thoroughly evaluated, along with the classical interfacial interactions. The described reinforcing mechanism may be responsible for other anomalous property changes in nanoparticulate composites reported in the literature. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Mechanics of Materials 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=89192294
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.mechmat.2013.02.004
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 79
    Subjects:
      – SubjectFull: Polymeric nanocomposites
        Type: general
      – SubjectFull: Fibrous composites
        Type: general
      – SubjectFull: Low density polyethylene
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Agglomerates (Chemistry)
        Type: general
    Titles:
      – TitleFull: Filler aggregation as a reinforcement mechanism in polymer nanocomposites.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Dorigato, Andrea
      – PersonEntity:
          Name:
            NameFull: Dzenis, Yuris
      – PersonEntity:
          Name:
            NameFull: Pegoretti, Alessandro
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 15
              M: 07
              Text: Jul2013
              Type: published
              Y: 2013
          Identifiers:
            – Type: issn-print
              Value: 01676636
          Numbering:
            – Type: volume
              Value: 61
          Titles:
            – TitleFull: Mechanics of Materials
              Type: main
ResultId 1