Abstract
The nanocomposites of liquid-crystal polymer (LCP) with two different weight per cents of clay were prepared via the melt extrusion method. To investigate the properties of the materials in the linear and non-linear viscoelastic regions, both oscillatory and rotational tests were carried out. The results showed that the nanocomposite with higher clay content exhibited an almost defectless partially cross-linked structure compared to the nanocomposite with lower clay content or the pure LCP. The linear stress relaxation measurements revealed that the pure LCP relaxed faster than nanocomposites after imposition of a constant strain for a specific time. During the step rate relaxation test, high shear rate modified the defects in the pure LCP very quickly and probably attained almost an equilibrium position while the nanocomposite samples showed strong shear thinning behaviour.
Original language | English |
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Pages (from-to) | 161-171 |
Number of pages | 11 |
Journal | Macromolecular Chemistry and Physics |
Volume | 210 |
Issue number | 2 |
DOIs | |
Publication status | Published - 5 Feb 2009 |
Externally published | Yes |
Keywords
- Melt-state iheological properties
- Nanocomposites
- Organoclay
- Thermotropic liquid-crystal polymer
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry