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Mechanical & Microstructural Evaluations of (High MFI PP/Low MFI PP)/Organoclay Nanocomposites Influence of Clay Loading, Compatibilizer Loading and Processing Sequence

Darestani Farahani, Amir | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48315 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Bagheri, Reza
  7. Abstract:
  8. Polymer/layered silicate nanocomposites are good candidates to improve polymer matrices due to enhanced interfaces between nanoclay reinforcement and matrix. So many attempts has been done to improve fabrication methods of these nanocomposites. Polypropylene is a common used engineering material in many industrial applications (general and special). So there is many researches focused on PP/Clay nanocomposites. In this research we tried to investigate the role of clay loading, compatibilizer loading and processing sequence on clay delamination and layer dispersion. We used a blend of two different PPs with different MFI values as matrice. It seems that the blend achieves acceptable properties as a nanocomposite. Nanocpmposites structure was syudied with X-ray diffraction method and scanning electron microscopy. Crystalinity and melting behavior was investigated using differential scanning calorimetry. Mechanical properties was obtained by standard tensile and impact tests. There were no sharp changes in tensile strength but improvements in tensile modulus and impact strength was observed due to addition of nanoclay. On the other hands, tensile modulus and impact strength decreased slightly by increasing compatibilizer content. It seems that using high MFI PP/low MFI PP masterbatchs is a good process to obtain good nanostructure and superior properties
  9. Keywords:
  10. Polymer Nanocomposits ; Layered Silicate ; Mechanical Properties ; Blending

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