1
|
Singh SP. Adhesion Failure and Rupturing of Ultra-Thin Polymer Film Near Melt: Role of Interfacial Effects. INTERNATIONAL JOURNAL OF NANOSCIENCE 2019. [DOI: 10.1142/s0219581x18500242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The results for the case of rupturing of an ultra-thin polymer film confined in a narrow planar geometry, are presented in this paper. NVT Monte Carlo simulation technique with Glauber kinetics has been used. Periodic boundary conditions are applied along [Formula: see text] and [Formula: see text] directions. Two planar surfaces at separations of [Formula: see text] and 6.75[Formula: see text] are used to confine the film. The lower substrate at [Formula: see text] has square well attractive affinity to the polymer beads, whereas the upper substrate at [Formula: see text] interacts with beads via hard sphere interaction. The properties as-pair correlation function, mean square displacement, density distribution, etc., are sampled for different parameters as pore widths [Formula: see text] and 6.75[Formula: see text], average number densities [Formula: see text] beads/[Formula: see text], 1.78 beads/[Formula: see text] and 1.56 beads/[Formula: see text], surface-film interaction of square well strengths [Formula: see text] and [Formula: see text] with range [Formula: see text] at different temperatures [Formula: see text], 2.0, 2.2 and 2.4. Aggregation of monomers at free ends of the chains appears to initiate tearing of the film, causing formation of strip-like structures. Repulsive force arising because of overlap in excluded volume regions, re-organize the beads. Stronger surface force leads to the crystallization of the film whereas lower surface affinity leads to adhesion failure. For moderate values of surface affinities, there exists a delicate balance between molecular forces amongst beads and the surface affinity. The complex nanopatterns thus formed are a result of interplay of these forces. The phenomena discussed in the paper mimics spinodal dewetting.
Collapse
Affiliation(s)
- Satya Pal Singh
- Department of Applied Sciences, Madan Mohan Malaviya University of Technology, (Formerly Known as Madan Mohan Malaviya Engineering College), Gorakhpur 273010, India
| |
Collapse
|
2
|
Adsorption of gas-like molecules to self-aligned square-well fluid channels under confinement of chemically patterned substrates. APPLIED NANOSCIENCE 2012. [DOI: 10.1007/s13204-012-0118-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|