{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc5135"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc5135","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"Micro and nano composites composed of a polymer matrix and a metal disperse phase.","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Olea Mejia, Oscar Fernando"],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Brostow, Witold, 1934-","Banerjee, Rajarshi","Buchman, Eli","Gorman, Brian P."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007-12","date_published":"2007-12","updated_at":"2026-07-24T05:35:09Z","subjects":["composites","mechanical properties","metal polymer composites","microcomposites","resistance","agglomerates","Nanostructured materials.","Polymeric composites.","Metallic composites."],"languages":["English"],"rights":["Public","Copyright","Olea Mejia, Oscar Fernando","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 230285408","https://digital.library.unt.edu/ark:/67531/metadc5135/","ark: ark:/67531/metadc5135"],"render_values":[{"text":"oclc: 230285408","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc5135/","href":"https://digital.library.unt.edu/ark:/67531/metadc5135/","code":true},{"text":"ark: ark:/67531/metadc5135","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc5135","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Brostow, Witold, 1934-","Banerjee, Rajarshi","Buchman, Eli","Gorman, Brian P."]},{"key":"dc:creator","label":"Author","values":["Olea Mejia, Oscar Fernando"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2007-12"]},{"key":"dc:publisher","label":"Institution","values":["University of North Texas"]},{"key":"dc:type","label":"Dc Type","values":["Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["composites","mechanical properties","metal polymer composites","microcomposites","resistance","agglomerates","Nanostructured materials.","Polymeric composites.","Metallic composites."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["Public","Copyright","Olea Mejia, Oscar Fernando","Copyright is held by the author, unless otherwise noted. 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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."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["Micro and nano composites composed of a polymer matrix and a metal disperse phase."]}]}],"canonical_facts":{"dc:contributor":["Brostow, Witold, 1934-","Banerjee, Rajarshi","Buchman, Eli","Gorman, Brian P."],"dc:creator":["Olea Mejia, Oscar Fernando"],"dc:date":["2007-12"],"dc: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."],"dc:format":["Text"],"dc:identifier":["oclc: 230285408","doi: 10.12794/metadc5135","https://digital.library.unt.edu/ark:/67531/metadc5135/","ark: ark:/67531/metadc5135"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Olea Mejia, Oscar Fernando","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["composites","mechanical properties","metal polymer composites","microcomposites","resistance","agglomerates","Nanostructured materials.","Polymeric composites.","Metallic composites."],"dc:title":["Micro and nano composites composed of a polymer matrix and a metal disperse phase."],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:35:09Z"}