| Autor: |
Shantalii, Tetyana A., Karpova, Iryna L., Dragan, Kateryna S., Privalko, Eleonora G., Karaman, Vitaly M., Privalko, Valery P. |
| Zdroj: |
Polymers for Advanced Technologies; May 2005, Vol. 16 Issue: 5 p400-404, 5p |
| Abstrakt: |
Poly(amide imide) (PAI) nanocomposites prepared by the in situgeneration of crosslinked organosilicon nanophase (ON) through the sol‐gel process were characterized by wide‐angle and small‐angle X‐ray diffraction, thermogravimetric analysis, dynamic mechanical analysis and kinetics of water uptake. It was concluded that the polymer nanocomposite (PNC) were likely to possess a complex morphology on the nanoscale characterized by co‐existence of two mixed nanophases of different compositions. At low methyl triethoxysilane (MTS) contents the fractal‐like organization of paracrystalline nano‐domains of PAI chain fragments is destroyed by the randomly distributed ON particles, whereas on the increase of MTS content the spatial correlations between ON particles become stronger, giving rise to their own fractal‐like structure. The higher values of small‐angle X‐ray scattering (SAXS) invariant, apparent water diffusivity and limiting water uptake for the PNC compared to the pristine PAI were assumed to reflect the loose inner structures of PAI‐rich and ON‐rich nanophases, respectively. Copyright © 2005 John Wiley & Sons, Ltd. |
| Databáze: |
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