Effect of Silver Nanoparticles on the Dynamic Crystallization Behavior of Nylon-6

Dong Wook Chae, Seong Geun Oh, Byoung Chul Kim

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The effect of introducing silver nanoparticles on the rheological properties and dynamic crystallization behavior of nylon-6 was investigated. The nanocomposites showed slightly higher viscosity than pure nylon-6 in the low-frequency range even at an extremely low loading level of the silver particles (0.5-1.0 wt %). The nanoparticles had a more noticeable effect on the storage modulus than on the loss modulus of a nylon-6 melt and reduced its loss tangent. They increased the crystallization temperature of nylon-6 by about 14°C and produced a sharper crystalline peak. The silver nanoparticles promoted the crystallization of nylon-6, and their effect on the dynamic crystallization of nylon-6 at 200°C was more notable at a lower shear rate and at 190°C at a higher frequency. Nylon-6 produced large spherulitic crystals, but the nanocomposites showed a grainy structure. In addition, the silver nanoparticles reduced the fraction of the α-form crystal but increased that of the γ-form crystal. The nanocomposites crystallized at 190°C showed a lower melting temperature than nylon-6 by about 3°C, whereas the nanocomposites crystallized at 200°C showed almost the same melting temperature.

Original languageEnglish
Pages (from-to)790-799
Number of pages10
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume42
Issue number5
DOIs
StatePublished - 1 Mar 2004

Keywords

  • Dynamic crystallization
  • Nanocomposites
  • Nylon-6
  • Rheology
  • Silver nanoparticles

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