Open AccessInfluence of shear on globule formation in dilute solutions of flexible polymers
Author(s) -
Rangarajan Radhakrishnan,
Patrick T. Underhill
Publication year - 2015
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.4917483
Subject(s) - polymer , breakup , shear flow , colloid , shear (geology) , chemical physics , polymer solution , shear rate , chemistry , flow (mathematics) , polyelectrolyte , materials science , thermodynamics , polymer chemistry , rheology , mechanics , composite material , organic chemistry , physics
Polyelectrolytes, polymers in poor solvents, polymers mixed with particles, and other systems with attractions and repulsions show formation of globules/structures in equilibrium or in flow. To study the flow behavior of such systems, we developed a simple coarse-grained model with short ranged attractions and repulsions. Polymers are represented as charged bead-spring chains and they interact with oppositely charged colloids. Neglecting hydrodynamic interactions, we study the formation of compact polymer structures called globules. Under certain conditions, increase in shear rate decreases the mean first passage time to form a globule. At other conditions, shear flow causes the globules to breakup, similar to the globule-stretch transition of polymers in poor solvents
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