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Delegates of the national rheological societies
Society's Site Mar 2013 - Aug 2013
Appl. Rheol. 23:1 (2013) 62-69
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► Cite this publication as follows:
Rheological Societies: Society's Site Mar 2013 - Aug 2013, Appl. Rheol. 23 (2013) 62.
Nadia Antonova
4th Eurosummer School on biorheology & Symposium on micro and nanomechanics and mechanobiology of cells, tissues and systems
Appl. Rheol. 23:1 (2013) 57-58
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► Cite this publication as follows:
Antonova N: 4th Eurosummer School on biorheology & Symposium on micro and nanomechanics and mechanobiology of cells, tissues and systems, Appl. Rheol. 23 (2013) 57.
Sabu Thomas, Nandakumar Kalarikkal, Jithin Joy
Third International Conference on Natural Polymers (ICNP 2012)
Appl. Rheol. 23:1 (2013) 59-60
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► Cite this publication as follows:
Thomas S, Kalarikkal N, Joy J: Third International Conference on Natural Polymers (ICNP 2012), Appl. Rheol. 23 (2013) 59.
Ulrich Alexander Handge
Geesthacht Polymer Days Rheology and Mechanics of Polymer Materials
Appl. Rheol. 23:1 (2013) 60-61
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► Cite this publication as follows:
Handge UA: Geesthacht Polymer Days Rheology and Mechanics of Polymer Materials, Appl. Rheol. 23 (2013) 60.
Abdelhakim Benslimane, Karim Bekkour, Pierre Francois
Effect of addition of Carboxymethylcellulose (CMC) on the rheology and flow properties of bentonite suspensions
Appl. Rheol. 23:1 (2013) 13475 (10 pages)
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In this work, bentonite suspension and mixtures containing 5 wt% of bentonite and 0.1 and 0.5 wt% of carboxymethyl cellulose
(CMC) were investigated in terms of their rheology and hydrodynamic behaviour in pipe flow. All fluids exhibited non-
Newtonian rheological behaviour that can be well described by the three parameters Herschel-Bulkley model. The axial
velocity distribution was determined using ultrasonic pulsed Doppler velocimetry technique. In the laminar regime the flow
parameters were predicted by integration of the constitutive rheological model used. In the turbulent flow, the Dodge and
Metzner model was applied to fit the experimental data. The measurements of the friction factor showed a small amount of
drag reduction for the pure bentonite suspension, whereas for the polymer.clay blend the drag reduction was more important.
► Cite this publication as follows:
Benslimane A, Bekkour K, Francois P: Effect of addition of Carboxymethylcellulose (CMC) on the rheology and flow properties of bentonite suspensions, Appl. Rheol. 23 (2013) 13475.
Amir Saadat, Hossein Nazockdast, Fatemeh Sepehr, Milad Mehranpoor
Viscoelastic modeling of extrudate swell of Acrylonitrile-Butadiene-Styrene/Clay nanocomposite
Appl. Rheol. 23:1 (2013) 12131 (11 pages)
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The aim of the present work was to predict the extrudate swelling behavior of organoclay containing Acrylonitrile-
Butadiene-Styrene (ABS) nanocomposite. The modeling was performed on the basis of unconstrained recovery concept originally
introduced by Tanner but employing Wagner viscoelastic model with generalized Wagner damping function which is
believed to be capable of taking into account the effect of organoclay on viscoelastic properties of nanocomposite sample.
This approach enabled us to evaluate the effect of organoclay on extrudate swell in terms of disentanglement kinetics and
chain relaxation behavior.
In our modeling, the effect of die entrance region on the extent of extrudate swelling was also considered.
In order to evaluate the validity of our modeling, the extrudate swell was measured as a function of wall shear stress
for samples varying in organoclay content. The results predicted from the model were found to be in relatively good agreement
with the experimental results.
► Cite this publication as follows:
Saadat A, Nazockdast H, Sepehr F, Mehranpoor M: Viscoelastic modeling of extrudate swell of Acrylonitrile-Butadiene-Styrene/Clay nanocomposite, Appl. Rheol. 23 (2013) 12131.
L.A. Pereira de Oliveira, J.P. Castro Gomes, M.C.S. Nepomuceno
The influence of wastes materials on the rheology of rendering mortars
Appl. Rheol. 23:1 (2013) 15505 (11 pages)
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The objective of this paper is to present the results of a research about the effect of mineral additions and specific lightweight
aggregates obtained from wastes materials (crushed EPS and cork) on the rheological properties of renderings mortars.
Four series of mortar formulations were prepared. Each series was composed by four mortars mixes with different mineral
additions: hydrated lime, glass powder, tungsten mine waste mud, and metakaolin. The proportions of the mortars
expressed in terms of apparent volume of cement, mineral addition and sand was 1:1:5. Flowability of mortar was measured
using a standard flow table test. The density and the water retention capacity of mortars were also determined. The mortar
rheological parameters were evaluated using a rheometer. The results show that the mortar yield stress is strongly influenced
by the water amount, binder fineness and mineral addition nature. The mortars plastic viscosity is also influenced by the
nature of mineral addition and the partial replacement of sand by EPS aggregates introduce incongruent values, caused by
the segregation, in the mortar yield stress, whereas, the cork aggregates is responsible by the yield stress reduction.
► Cite this publication as follows:
PereiradeOliveira LA, CastroGomes JP, Nepomuceno M: The influence of wastes materials on the rheology of rendering mortars, Appl. Rheol. 23 (2013) 15505.
Mohamed Ilies Bahlouli, Karim Bekkour, Adel Benchabane, Yacine Hemar, Ali Nemdili
The effect of temperature on the rheological behavior of polyethylene oxide (PEO) solutions
Appl. Rheol. 23:1 (2013) 13435 (15 pages)
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The rheological properties of polyethylene oxide (PEO) solutions were investigated, at different temperatures, using small
and large deformation rheological methods. Steady-state flow measurements showed that the flow behavior of the PEO
solutions is well described by the Cross model, which yields the critical concentrations c* (from the dilute regime to semidilute
regime) and c** (from the semi-dilute regime to the concentrated regime). In the range of the temperatures investigated
here, the apparent viscosity is found to obey the Arrhenius equation below a critical temperature we believe corresponds
to the cloud point temperature. Above the cloud point temperature, the viscosity increased with temperature. Similarly
below the cloud point, both transient and dynamic tests showed that PEO solutions exhibit viscoelastic behavior, where both
the elastic G' and viscous G'' modules increased with the increase in concentration and with the decrease in temperature. The
Cox-Merz rule was found to apply to the PEO solutions at temperatures lower than the cloud point temperature, whilst divergence
was reported after phase separation. The frequencies at which G' = G'', i.e. the reciprocal of the relaxation times of the
temporary polymer network, was found to increase (the relaxation times decline) with decreasing polymer concentration, in
agreement with the relaxation times, derived from the Cross model. In essence, this study demonstrates that it is possible to
monitor accurately the cloud point temperature of PEO solutions by viscometric analysis.
► Cite this publication as follows:
Bahlouli MI, Bekkour K, Benchabane A, Hemar Y, Nemdili A: The effect of temperature on the rheological behavior of polyethylene oxide (PEO) solutions, Appl. Rheol. 23 (2013) 13435.
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