Type
Text
Type
Thesis
Advisor
Sokolov, Jonathon | Koga, Tadanori | Venkatesh, T.A.
Date
2012-05-01
Keywords
Materials Science
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/11401/71472
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
In this paper, adsorbed polybutadiene (PB) layers onto solid substrates have been studied with two different molecular weights and different terminated groups. Spin cast PB film (originally around 25 nm in thickness) prepared on two kinds of preconditioning (with and without HF etch) in silicon substrates. The samples were annealed at 150??C for 10 h under vacuum and subsequently rinsed with toluene (a good solvent for PB) extensively. The residual PB layers were characterized by using X-ray reflectivity, and the result showed that the adsorbed layers were well fitted by a 3-layer (a silicon substrate, a native oxide, a polymer layer) model for non-end functionalized PB and a 4-layer model (a silicon substrate, a native oxide, a high density polymer layer and low density polymer layer) for hydroxyl PB adsorbed layer, respectively. Further experiments using supercritical carbon dioxide (scCO2) as a screen solvent proved that the interfacial energy is a key to explain the difference in the structures between the two polybutadiene adsorbed layers. | 40 pages
Recommended Citation
ZEXI, HAN, "Adsorption of polybutadiene from the melt onto solid substrates" (2012). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 678.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/678