FORCE-INDUCED DESORPTION OF SEMI-FLEXIBLE POLYMERS IN NON-HOMOGENEOUS MEDIA

Authors

  • Sunčica Elezović-Hadžić University of Belgrade, Faculty of Physics, Studentski trg 12, Belgrade, Serbia
  • Ivan Živić University of Kragujevac, Faculty of Science, Radoja Domanovića 12, Kragujevac, Serbia
  • Dušanka Lekić University of Banja Luka, Faculty of Science, Mladena Stojanovića 2, Banja Luka, Republic of Srpska

DOI:

https://doi.org/10.7251/COMEN1801087E

Abstract

Force-induced desorption of semi-flexible linear polymers in good solvents
and non-homogeneous media is studied. We apply the model of self-avoiding walk with bending
rigidity on 3-simplex fractal lattice. One boundary of the lattice represents an adsorbing
wall, while an external force (perpendicular to the wall) pulls the polymer from the wall. Due to
the hierarchical structure of the lattice under study, the phase diagram of polymer critical behavior
can be exactly studied by real-space renormalization group method. Temperature dependence
of the critical force, at which desorption occurs, is obtained and discussed for various
values of the bending rigidity. Influence of the force and the polymer rigidity on the nature of
desorption phase transition is also analyzed. All obtained results are compared with the related
previous ones.

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Published

2021-10-26

Issue

Vol. 9 No. 1 (2018): Contemporary Materials IX-1

Section

Articles