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Preparation and Characterization of Poly (lactic acid) - Poly (vinylidene fluoride) – Carbon Nanotubes Nano-composites

Mohammad Morady, Sahar | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48848 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Frounchi, Masoud
  7. Abstract:
  8. Composite film PLA/PVDF and nanocomposite films PLA/PVDF/MWCNT with a solution method by solvent Dimethyl formamide was prepared at 65◦c. poly vinylidene fluoride as matrix phase and poly lacticacid was used an amplifier. In the next sextion multiwalled carbon nanotubes were added to the PLA/PVDF composite.Scaning Electron microscope results, showed that the PLA/PVDF composite and PLA/PVDF/MWCNT nanocomposites, non porous structure and carbon nanotubes in the polymer matrix have been well dispersed. The impact of nanoparticles in the polymer matrix by X-Ray Diffraction and Differential Scaning Calorimetry was investigated. With differential scaning calorimeter (DSC) and stress strain test, thermal and mechanical properties of the composite films was examined. As the DSC results showed, addition of MWCNTs would lead to the increased melting temperature, implying that MWCNTs nanoparticles coud act as nucleating agent and confirmed the phase transformation from α phase to β phase as the β crystals have higher Tm .Mechanical properties of nanocomposites by the tensile test show that carbon nanotubes to improve the mechanical properties.To analyze the chemical structure and surface links nanocomposites of Fourier transform spectroscopy was used.PLA / PVDF / MWCNT nanocomposites more mechanical properties of the PLA/PVDF composite. Nano composites showed higher heat resistance
  9. Keywords:
  10. Polylactic Acid ; Polyvinylidene Fluoride (PVDF) ; Carbon Nanotubes ; Nanocomposite

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