Investigation of Mechanical and Rheological Properties of Recycled PP – Calciumcarbonat Nanocomposites

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Janzadeh, Amir Hossin | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46577 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Moosavi, Abass; Frounchi, Masood
Abstract:
In this work the effect of recycling process and nanometric CaCO3 on the rheological and heat-sealing properties of co-polymer Polypropylene (R40) was studied. Nanocomposites with recycled and neat matrix were prepared with twin extruder. Complex viscosity, dynamic modulus, flexural and tensile properties, impact strength and sealing ability of nanocomposites of neat Co-PP (R40) and Recycled Co-PP (RPP) determined according to the relevant standard specifications.Rheological analysis revealed that incorporation of nanofiller enhances values of Complex viscosity and dynamic modulus, broadening molecular weight distribution (MWD) and decrease cross over point (ωc, GC) for RPP. In this study, we explained Adhesive behavior by rheological roperties.Bond strength of RPP improved with nanoparticles, significantly. The sealing behavior was correlated with cross over points (ωc,GC) of the sealant polymers. An enhancement of properties is more pronounced for RPP due to better dispersion and disterbutionof CaCO3
Keywords:
Rheological Properties ; Weld Strength ; Calcium Carbonate Nanoparticles ; Mechanical Properties ; Polypropylene Nanocomposite ; Recycled Ploypropylene