Friction and wear of monolithic and glass-fiber reinforced PA66 in humid conditions

J. W. Kim, H. Jang, Jin Woo Kim

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


Effect of water absorption on friction and wear of polyamides, namely monolithic polyamide 66 (PA66) and PA66 composite with 30. wt% of short glass fibers, was investigated using a block-on-ring-type tribotester. Monolithic PA66 showed high wear rates after water absorption because of softening by the absorbed water molecules and increased interfacial adhesion on the steel counter surface. Degraded wear characteristics of monolithic PA66 by chain scission of the amide functional group by water molecules were substantially improved by short glass-fiber reinforcement. The improved friction and wear characteristics were attributed to contact plateaus produced during sliding, which were held by condensed glass fibers, suggesting possible applications of PA66 in a humid environment by reinforcing it with short glass fibers.

Original languageEnglish
Pages (from-to)82-88
Number of pages7
Issue number1-2
Publication statusPublished - 2014 Jan 15


  • Contact plateau
  • Glass fiber
  • Polyamide
  • Sliding wear
  • Surface topography
  • Water absorption

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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