Micro and nano composites composed of a polymer matrix and a metal disperse phase. Metadata

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Title

  • Main Title Micro and nano composites composed of a polymer matrix and a metal disperse phase.

Creator

  • Author: Olea Mejia, Oscar Fernando
    Creator Type: Personal

Contributor

  • Chair: Brostow, Witold
    Contributor Type: Personal
    Contributor Info: Major Professor
  • Committee Member: Banerjee, Rajarshi
    Contributor Type: Personal
  • Committee Member: Buchman, Eli
    Contributor Type: Personal
  • Committee Member: Gorman, Brian P.
    Contributor Type: Personal

Publisher

  • Name: University of North Texas
    Place of Publication: Denton, Texas

Date

  • Creation: 2007-12
  • Digitized: 2008-03-25

Language

  • English

Description

  • Content Description: Low density polyethylene (LDPE) and Hytrel (a thermoplastic elastomer) were used as polymeric matrices in polymer + metal composites. The concentration of micrometric (Al, Ag and Ni) as well as nanometric particles (Al and Ag) was varied from 0 to 10 %. Composites were prepared by blending followed by injection molding. The resulting samples were analyzed by scanning electron microscopy (SEM) and focused ion beam (FIB) in order to determine their microstructure. Certain mechanical properties of the composites were also determined. Static and dynamic friction was measured. The scratch resistance of the specimens was determined. A study of the wear mechanisms in the samples was performed. The Al micro- and nanoparticles as well as Ni microparticles are well dispersed throughout the material while Ag micro and nanoparticles tend to form agglomerates. Generally the presence of microcomposites affects negatively the mechanical properties. For the nanoparticles, composites with a higher elastic modulus than that of the neat materials are achievable. For both micro- and nanocomposites it is feasible to lower the friction values with respective to the neat polymers. The addition of metal particles to polymers also improves the scratch resistance of the composites, particularly so for microcomposites. The inclusion of Ag and Ni particles causes an increase in the wear loss volume while Al can reduce the wear for both polymeric matrices.

Subject

  • Keyword: Composites
  • Keyword: mechanical properties
  • Keyword: metal polymer composites
  • Library of Congress Subject Headings: Nanostructured materials.
  • Library of Congress Subject Headings: Polymeric composites.
  • Library of Congress Subject Headings: Metallic composites.

Collection

  • Name: UNT Theses and Dissertations
    Code: UNTETD

Institution

  • Name: UNT Libraries
    Code: UNT

Rights

  • Rights Access: public
  • Rights License: copyright
  • Rights Holder: Olea Mejia, Oscar Fernando
  • Rights Statement: Copyright is held by the author, unless otherwise noted. All rights reserved.

Resource Type

  • Thesis or Dissertation

Format

  • Text

Identifier

  • OCLC: 230285408
  • Archival Resource Key: ark:/67531/metadc5135

Degree

  • Degree Name: Master of Science
  • Degree Level: Master's
  • Degree Discipline: Materials Science and Engineering
  • Academic Department: Department of Materials Science and Engineering
  • Degree Grantor: University of North Texas

Note