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University of Akron

1. Almazrou, Yaser M. EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS.

Degree: MSin Polymer Engineering, Polymer Engineering, 2018, University of Akron

Usage of polymer blend thin films has been proved to be very useful in today’sindustry. However, thin films instability and geometric confinement restrict manyapplications. By controlling the morphology of the phase separated blend, the productperformance and properties can be manipulated.This study focuses on the morphological changes associated with the addition ofmobile titanium dioxide nanoparticles to immiscible polysulfone/polyimide blends.Addition of mobile fillers impacted the morphology differently compared to immobilefillers due to the presence of the dynamic factor. Optical microscopy and AFM were usedto capture the features of morphology and topography of the surface. TEM was used toinvestigate the distribution and dispersion of nanoparticles in each phase. Surfacecomposition of the thin films was revealed using XPS. The effect of nanoparticles on thesurface energy of the thin films was examined by contact angle measurements.The phase separation in the 100 nm films showed a dependence on thecomposition of the blend. Asymmetric blends had droplet-like/continuous domains andthe symmetric blend showed irregular shapes dispersed phase in a continuous phase. Theaddition of a low amount of TiO2 has shown to enhance the coalescence process andproduce 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 actas compatibilizers and reduced the domain sizes, which would enhance the mechanicalproperties of the films. The reason for that was found to be related to the viscosityincrease due to the addition of NP. The patterns on the surface of thin films followed asimilar trend.Film surface was found to form different composition than the initial blendcomposition due to the surface tension and solubility of polymers in the solvent. Thetotal surface free energies of the thin films were found not to be affected by the additionof NP. Advisors/Committee Members: Karim, Alamgir (Advisor).

Subjects/Keywords: Polymers; Plastics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Almazrou, Y. M. (2018). EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS. (Masters Thesis). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354

Chicago Manual of Style (16th Edition):

Almazrou, Yaser M. “EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS.” 2018. Masters Thesis, University of Akron. Accessed December 12, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354.

MLA Handbook (7th Edition):

Almazrou, Yaser M. “EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS.” 2018. Web. 12 Dec 2018.

Vancouver:

Almazrou YM. EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS. [Internet] [Masters thesis]. University of Akron; 2018. [cited 2018 Dec 12]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354.

Council of Science Editors:

Almazrou YM. EFFECTS OF MOBILE NANOPARTICLES ON THE MORPHOLOGY AND TOPOGRAPHY OF POLYSULFONE/POLYIMIDE THIN FILMS. [Masters Thesis]. University of Akron; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1531145752009354

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