Thermophysical and rheological behavior of polystyrene/silica nanocomposites: Investigation of nanoparticle content

Vaziri, H. S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2011.01.022
  3. Abstract:
  4. In this work, solvent blending in combination with extruding are applied to provide polystyrene/silica nanocomposite specimens. Transmission electron microscope (TEM) and scanning electron microscope (SEM) show same nanoparticle dispersion in PS matrix in low to high filler loadings. Differential scanning calorimetry (DSC), dynamic mechanical thermal analyzer (DMTA) and thermogravimetric analyzer (TGA) were used to study the thermophysical characteristic of the nanocomposites in solid state. In addition, the melt state rheological behavior of the samples was investigated under constant and zero shear rates. Interestingly, different behaviors were detected in nanocomposites in low and high nanoparticle loadings. In addition, rheological characteristics of molten polymer are dramatically affected in samples with low nanosilica concentration while stabilized in high filler loadings
  5. Keywords:
  6. Extrusion ; Polymer matrix composites ; Thermal ; Dynamic mechanical thermal analyzers ; High filler ; Low-to-high ; matrix ; Melt state ; Molten polymers ; Nano-particle dispersions ; Nano-silica ; Nanoparticle loadings ; Rheological behaviors ; Rheological characteristics ; Scanning electron microscopes ; Shear rates ; Solvent blending ; Thermogravimetric analyzers ; Thermophysical ; Thermophysical characteristics ; Transmission electron microscope ; Blending ; Differential scanning calorimetry ; Electron microscopes ; Filled polymers ; Fillers ; Loading ; Nanocomposites ; Nanoparticles ; Polystyrenes ; Scanning electron microscopy ; Shear deformation ; Thermoanalysis ; Transmission electron microscopy ; Rheology
  7. Source: Materials and Design ; Volume 32, Issue 8-9 , 2011 , Pages 4537-4542 ; 02641275 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0261306911000252