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Stability of Adsorbed Polystyrene Nanolayers on Silicon Substrates
- Source :
- Macromolecular Chemistry and Physics. 219:1700326
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- The solid–polymer melt interface is of great scientific interest due to its vital importance in governing a wide array of physical and mechanical properties of polymer thin films. Recent studies have elucidated the coexistence of two different chain conformations of polymer chains adsorbed on a solid (i.e., loosely adsorbed chains and flattened chains). In this work, film stabilities of the polystyrene (PS) “interfacial sublayer” (composed of outer loosely adsorbed chains and inner flattened chains) and flattened layer (composed of the lone flattened chains) prepared on silicon (Si) substrates are investigated. The atomic force microscopy studies reveal that the as-rinsed PS flattened layer is subjected to spinodal-like dewetting during a post-thermal annealing process even at temperatures below the bulk glass transition temperature. Furthermore, it is found that the surface morphology of the flattened layer can be reversibly changed from a homogeneous pattern under good solvent conditions to spinodal-like droplets under poor solvent conditions. By contrast, it is found that the PS interfacial sublayer remains stable under both good and poor solvent conditions. These findings illuminate the role which density variations within the adsorbed layers play in the mechanism behind the wetting-dewetting transition.
- Subjects :
- Materials science
Polymers and Plastics
Silicon
Annealing (metallurgy)
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
chemistry.chemical_compound
Adsorption
Polymer chemistry
Materials Chemistry
Organic chemistry
Dewetting
Physical and Theoretical Chemistry
chemistry.chemical_classification
Organic Chemistry
Polymer
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Solvent
Chemical engineering
chemistry
Polystyrene
0210 nano-technology
Glass transition
Subjects
Details
- ISSN :
- 15213935 and 10221352
- Volume :
- 219
- Database :
- OpenAIRE
- Journal :
- Macromolecular Chemistry and Physics
- Accession number :
- edsair.doi...........9652c472a3ec0dcfb926902d935e20d0
- Full Text :
- https://doi.org/10.1002/macp.201700326