Type
Text
Type
Dissertation
Advisor
Sokolov, Jonathan | Koga, Tadanori | Yager, Kevin G | Nam, Chang-Yong | Koga, Tadanori.
Date
2017-05-01
Keywords
Polymer chemistry -- Materials Science -- Physics | Adsorbed layer, Flattened layer, Nano-confinement, Polymer physics, Polymer thin films, X-ray scattering
Department
Department of Materials Science and Engineering
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/76257
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
In this thesis, by combining various advanced x-ray scattering, spectroscopic and other surface sensitive characterization techniques, I report the equilibrium polymer chain conformations, structures, dynamics and properties of polymeric materials at the solid-polymer melt interfaces. Following the introduction, in chapter 2, I highlight that the backbone chains (constituted of CH and CH2 groups) of the flattened polystyrene (PS) chains preferentially orient normal to the weakly interactive substrate surface via thermal annealing regardless of the initial chain conformations, while the orientation of the phenyl rings becomes randomized, thereby increasing the number of surface-segmental contacts (i.e. | enthalpic gain) which is the driving force for the flattening process of the polymer chains even onto a weakly interactive solid. In chapter 3, I elucidate the flattened structures in block copolymer (BCP) thin films where both blocks lie flat on the substrate, forming a 2D randomly phase-separated structure irrespective of their microdomain structures and interfacial energetics. In chapter 4, I reveal the presence of an irreversibly adsorbed BCP layer which showed suppressed dynamics even at temperatures far above the individual glass transition temperatures of the blocks. Furthermore, this adsorbed BCP layer plays a crucial role in controlling the microdomain orientation in the entire film. In chapter 5, I report a radically new paradigm of designing a polymeric coating layer of a few nanometers thick (“polymer nanolayer†) with anti-biofouling properties. | 109 pages
Recommended Citation
Sen, Mani Kuntal, "Adsorbed polymer nanolayers on solids: mechanism, structure and applications" (2017). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 2187.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/2187