The effect of nanoparticle inclusion on the tensile and mode I fracture properties of polyimides

Kimiyoshi Naito, Jenn Ming Yang, Yutaka Kagawa

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Polyimide nanocomposites were fabricated using a combination of rotation/revolution mixing, layer-by-layer deposition and autoclave curing techniques. Seven different types of nanoparticles (25nm C, 20-30nm β-SiC, 130nm β-SiC, 10nm SiOx (x=1.2-1.6), 80nm SiO2, 11nm γ-Al2O3 and 40-80nm γ-Al2O3) and four different particle volume fractions (0.5, 1, 5 and 10vol%) were used for the inclusion. The effect of nanoparticle inclusion on the tensile properties and mode I fracture toughness was also investigated. The tensile modulus of the nanoparticle-filled polyimides was improved by the nanoparticle inclusion and increased with increasing volume fraction of the nanoparticles. No large differences in the tensile strength were observed for the nanoparticle-filled and unfilled polyimides. The mode I fracture toughness of the nanoparticle-filled polyimides was improved by C, β-SiC, SiOx (x=1.2-1.6), SiO2 and γ-Al2O3 nanoparticle inclusion and the maximum mode I fracture toughness, indicated by the critical stress intensity factor, was observed at approximately 5vol% nanoparticle content for each type of nanoparticle-filled polyimide.

Original languageEnglish
Pages (from-to)357-366
Number of pages10
JournalMaterials Science and Engineering: A
Volume530
Issue number1
DOIs
Publication statusPublished - 2011 Dec 15

Keywords

  • Fracture toughness
  • Nanoparticle
  • Polyimide
  • Tensile properties

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