| dc.contributor | 應物所 | en_US |
| dc.creator (作者) | 林瑜琤 | zh_TW |
| dc.creator (作者) | Lin, Yu-Cheng | en_US |
| dc.date (日期) | 2004.08 | en_US |
| dc.date.accessioned | 1-May-2014 17:54:18 (UTC+8) | - |
| dc.date.available | 1-May-2014 17:54:18 (UTC+8) | - |
| dc.date.issued (上傳時間) | 1-May-2014 17:54:18 (UTC+8) | - |
| dc.identifier.uri (URI) | http://nccur.lib.nccu.edu.tw/handle/140.119/65812 | - |
| dc.description.abstract (摘要) | The interface and surface properties and the wetting behavior of polymer-solvent mixtures are investigated using Monte Carlo simulations and self-consistent field calculations. We carry out Monte Carlo simulations in the framework of a coarse-grained bead-spring model using short chains (oligomers) of NP=5 beads and a monomeric solvent,NS=1. The self-consistent field calculations are based on a simple phenomenological equation of state for compressible binary mixtures and we employ Gaussian chain model. The bulk behavior of the polymer-solvent mixture belongs to type III in the classification of van Konynenburg and Scott [Phil. Trans. R. Soc. London, Ser. A 298, 495 (1980)]. It is characterized by a triple line on which the polymer-liquid coexists with solvent-vapor and a solvent-rich liquid. The solvent is not homogeneously distributed across the dense polymer film but tends to accumulate at the surface and the polymer-vapor interface. This solvent enrichment at the interface and surface becomes more pronounced upon increasing the vapor pressure and alters the surface and interface tensions. This effect gives rise to a nonmonotonic dependence of the contact angle on the vapor pressure and one might observe reentrant wetting. The results of the Monte Carlo simulations and the self-consistent field calculations qualitatively agree. The profiles of drops are investigated by Monte Carlo simulations and a pronounced solvent enrichment is observed at the wedge formed by the substrate and the liquid-vapor interface at the three-phase contact line. | en_US |
| dc.format.extent | 943810 bytes | - |
| dc.format.mimetype | application/pdf | - |
| dc.language.iso | en_US | - |
| dc.relation (關聯) | J. Chem. Phys., 121(8), 3816-3828 | en_US |
| dc.title (題名) | Stability of thin polymer films: influence of solvents | en_US |
| dc.type (資料類型) | article | en |
