Monte Carlo simulations of the exchange kinetics of polymers adsorbed on a solid surface

✍ Scribed by Hisao Takeuchi

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 178 KB
• Volume: 8
• Category: Article
• ISSN: 1022-1344
• DOI: 10.1002/(sici)1521-3919(19990701)8:4<391::aid-mats391>3.0.co;2-3

✦ Synopsis

The exchange kinetics of polymers adsorbing on a solid surface is extensively studied by dynamic Monte Carlo simulations. A model employed simulates a semidilute polymer solution placed in contact with a solid surface that attracts polymer segments by the adsorption interaction (v s ). The exchange process of polymer chains, between the solution and the adsorbed polymer layer, is examined under various conditions. The exchange kinetics shows two characteristic regimes with increasing chain length. One is the diffusion-controlled regime found with a small v s , and the other the detachment-controlled regime with a large v s . These two regimes are well described by a kinetic theory. Various dynamic quantities show that the diffusion-controlled regime is not due to sluggish dynamics near the surface, but rather to bulk diffusion of chains. The diffusion-controlled regime found in this study is considered to appear at the high temperature limit.