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EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS

Almazrou, Yaser M.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354

Abstract Details

2018, Master of Science in Polymer Engineering, University of Akron, Polymer Engineering.
Usage of polymer blend thin films has been proved to be very useful in today’s industry. However, thin films instability and geometric confinement restrict many applications. By controlling the morphology of the phase separated blend, the product performance and properties can be manipulated. This study focuses on the morphological changes associated with the addition of mobile titanium dioxide nanoparticles to immiscible polysulfone/polyimide blends. Addition of mobile fillers impacted the morphology differently compared to immobile fillers due to the presence of the dynamic factor. Optical microscopy and AFM were used to capture the features of morphology and topography of the surface. TEM was used to investigate the distribution and dispersion of nanoparticles in each phase. Surface composition of the thin films was revealed using XPS. The effect of nanoparticles on the surface energy of the thin films was examined by contact angle measurements. The phase separation in the 100 nm films showed a dependence on the composition of the blend. Asymmetric blends had droplet-like/continuous domains and the symmetric blend showed irregular shapes dispersed phase in a continuous phase. The addition of a low amount of TiO2 has shown to enhance the coalescence process and produce larger spherical dispersed droplets. This is attributed to NP small aggregations and selective adsorption to polyimide. On the other hand, high loadings had shown to act as compatibilizers and reduced the domain sizes, which would enhance the mechanical properties of the films. The reason for that was found to be related to the viscosity increase due to the addition of NP. The patterns on the surface of thin films followed a similar trend. Film surface was found to form different composition than the initial blend composition due to the surface tension and solubility of polymers in the solvent. The total surface free energies of the thin films were found not to be affected by the addition of NP.
Alamgir Karim (Advisor)
Younjin Min (Committee Member)
Kevin Cavicchi (Committee Member)
89 p.
Plastics; Polymers

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Citations

  • Almazrou, Y. M. (2018). EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354

    APA Style (7th edition)

  • Almazrou, Yaser. EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354.

    MLA Style (8th edition)

  • Almazrou, Yaser. "EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354

    Chicago Manual of Style (17th edition)

akron1531145752009354
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This open access ETD is published by University of Akron and OhioLINK.