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 language | English |
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Pages (from-to) | 790-799 |
Number of pages | 10 |
Journal | Journal of Polymer Science, Part B: Polymer Physics |
Volume | 42 |
Issue number | 5 |
DOIs | |
State | Published - 1 Mar 2004 |
Keywords
- Dynamic crystallization
- Nanocomposites
- Nylon-6
- Rheology
- Silver nanoparticles