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Stress‐Temperature Effects on Transitions in PEO 17 PPO 60 PEO 17 Triblock Copolymer Micellar Solutions
Author(s) -
PérezGarcía María Guadalupe,
Landázuri Gabriel,
PérezCarrillo Lourdes Adriana,
GonzálezÁlvarez Alejandro,
Puig Jorge E.,
Rharbi Yahya,
Armando Soltero J. F.
Publication year - 2014
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-013-1525-6
Subject(s) - copolymer , rheology , materials science , shear stress , temperature jump , micellar solutions , shear (geology) , micelle , saturation (graph theory) , shear rate , dynamic light scattering , viscosity , light scattering , stress (linguistics) , thermodynamics , composite material , scattering , aqueous solution , chemistry , polymer , optics , organic chemistry , physics , mathematics , combinatorics , nanoparticle , nanotechnology , linguistics , philosophy
In this work, the shear thickening behavior of micellar solutions of the PEO 17 PPO 60 PEO 17 triblock copolymer as a function of applied shear stress and temperature is reported. Both, dynamic light scattering and rheological measurements, confirm micellar growth upon increasing temperature and/or applied stress, after an induction time. A synergetic effect of temperature and stress on the intensity of shear thickening (up to three‐order of magnitude) is demonstrated by a combination of T ‐jump experiments and application of shear stress. The effect of temperature on the induction and saturation times, detected during the viscosity rise after applying both, a T ‐jump and shear stress, is also examined.