Parisa Khoshnoud
Self-motivated Ph.D candidate in Materials Science and Engineering program at University of Wisconsin-Milwaukee (UWM) with a strong background in polymer science and engineering. Well experienced in polymer chemistry, synthesis, formulation, characterization, and processing.
Areas of expertise include:
1- Hands-on experienced in PVC foam reinforced with fly ash, mica, and glass fiber preparation, processing, and characterization.
2- Experienced in working with instruments such as:
-Spectroscopy Characterization methods: FT-IR, Raman, UV-Vis.
-Structural and Morphological Characterization methods: X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Elemental analysis (with Energy Dispersive X-ray Spectroscopy or EDS), Laser scanning microscope
-Physical &Mechanical Characterization methods: (Tensile, Flexural, Impact, Fatigue, Abrasion, Hardness)
-Thermal Characterization methods: Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Dynamic Mechanical Thermal Analysis (DMTA)
-Processing instruments: Extruder, Injection Molding, Internal Mixer, Two-roll mill.
Supervisors: Dr. Nidal Abu-Zahra
Areas of expertise include:
1- Hands-on experienced in PVC foam reinforced with fly ash, mica, and glass fiber preparation, processing, and characterization.
2- Experienced in working with instruments such as:
-Spectroscopy Characterization methods: FT-IR, Raman, UV-Vis.
-Structural and Morphological Characterization methods: X-Ray Diffraction (XRD), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Elemental analysis (with Energy Dispersive X-ray Spectroscopy or EDS), Laser scanning microscope
-Physical &Mechanical Characterization methods: (Tensile, Flexural, Impact, Fatigue, Abrasion, Hardness)
-Thermal Characterization methods: Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Dynamic Mechanical Thermal Analysis (DMTA)
-Processing instruments: Extruder, Injection Molding, Internal Mixer, Two-roll mill.
Supervisors: Dr. Nidal Abu-Zahra
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Papers by Parisa Khoshnoud
The storage modulus and tensile strength of the composites were also enhanced with the addition of mica. However, increasing the concentration of mica had no significant effect on the impact and flexural properties of the composites. SEM micrographs show good dispersion and orientation of the mica flakes along the cell walls of the PVC foam. Overall, the platy structure and physical properties of mica seemed to have played an important role in providing good interfacial bonding with the cell membranes of the foam, thus enhancing the dimensional stability of the PVC/Mica foam composites.
with shorter (1/32") glass fibers. Microstructural observations suggest that this is due to better interlocking between the long fibers and the foam cells, which result in better load distribution in the matrix.
cell walls of the polyvinyl chloride foam.
(1/16" and 1/32") were added into rigid PVC foams to enhance the
dimensional stability of extruded rigid Polyvinyl Chloride (PVC)
foam at different concentrations (0-20 phr) using a single screw
profile extruder. PVC foam-glass fiber composites (PVC-GF) were
characterized for their dimensional stability, structural, thermal, and
mechanical properties. Experimental results show that the
dimensional stability, heat resistance, and storage modulus were
enhanced without compromising the tensile and flexural strengths of
the composites. Overall, foam composites which were prepared with
longer glass fibers exhibit better mechanical and thermal properties
than those prepared with shorter glass fibers due to higher
interlocking between the fibers and the foam cells, which result in
better load distribution in the matrix.
show an increase in the foam density with increasing regrind and fly ash contents. The melt viscosity increased with increasing the regrind concentration; however, it dropped with increasing the fly ash content. The tensile strength increased with increasing the regrind content, indicating a good degree of gelation in the composites. Meanwhile, the charpy impact strength of the composites decreased due to the high rigidity of fly ash particles. Dynamic mechanical analysis
show that the storage modulus improved with both the addition and increasing the amount of regrind, which confirmed good stress transformation between the polymer foam matrix and the fly ash particles. The polymer matrix morphology, as was determined by scanning electron microscopy (SEM), confirmed uniform foam structure even with the addition of 40 wt% regrind in the virgin PVC.
The storage modulus and tensile strength of the composites were also enhanced with the addition of mica. However, increasing the concentration of mica had no significant effect on the impact and flexural properties of the composites. SEM micrographs show good dispersion and orientation of the mica flakes along the cell walls of the PVC foam. Overall, the platy structure and physical properties of mica seemed to have played an important role in providing good interfacial bonding with the cell membranes of the foam, thus enhancing the dimensional stability of the PVC/Mica foam composites.
with shorter (1/32") glass fibers. Microstructural observations suggest that this is due to better interlocking between the long fibers and the foam cells, which result in better load distribution in the matrix.
cell walls of the polyvinyl chloride foam.
(1/16" and 1/32") were added into rigid PVC foams to enhance the
dimensional stability of extruded rigid Polyvinyl Chloride (PVC)
foam at different concentrations (0-20 phr) using a single screw
profile extruder. PVC foam-glass fiber composites (PVC-GF) were
characterized for their dimensional stability, structural, thermal, and
mechanical properties. Experimental results show that the
dimensional stability, heat resistance, and storage modulus were
enhanced without compromising the tensile and flexural strengths of
the composites. Overall, foam composites which were prepared with
longer glass fibers exhibit better mechanical and thermal properties
than those prepared with shorter glass fibers due to higher
interlocking between the fibers and the foam cells, which result in
better load distribution in the matrix.
show an increase in the foam density with increasing regrind and fly ash contents. The melt viscosity increased with increasing the regrind concentration; however, it dropped with increasing the fly ash content. The tensile strength increased with increasing the regrind content, indicating a good degree of gelation in the composites. Meanwhile, the charpy impact strength of the composites decreased due to the high rigidity of fly ash particles. Dynamic mechanical analysis
show that the storage modulus improved with both the addition and increasing the amount of regrind, which confirmed good stress transformation between the polymer foam matrix and the fly ash particles. The polymer matrix morphology, as was determined by scanning electron microscopy (SEM), confirmed uniform foam structure even with the addition of 40 wt% regrind in the virgin PVC.