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On the deformation of star shaped polystyrenes in flowing solutions
Author(s) -
Dondos Anastasios,
Papanagopoulos Dimitrios,
de Gennes PierreGilles,
BrochardWyart Françoise
Publication year - 1999
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/(sici)1521-3919(19990301)8:2<147::aid-mats147>3.0.co;2-d
Subject(s) - elongation , simple shear , deformation (meteorology) , polymer , rigidity (electromagnetism) , materials science , star polymer , star (game theory) , polymer chemistry , shear (geology) , composite material , thermodynamics , chemistry , physics , astrophysics , copolymer , ultimate tensile strength
The elongation of star shaped polystyrenes in flowing solutions depends on their number of branches and becomes lower when the number of branches increases. The deformation of these polymers, expressed by the change of the critical concentrations c ** and c * , varies as ( f /2) 2 for a constant difference in shear rate ( f is the number of branches). A simple theoretical model correlates the increase of the resistance to the deformation or the rigidity of the star shaped polymers to the factor ( f /2) 2 .