The effects of recycled-branched polypropylenes on their rheological properties and foamability are studied and compared with the virgin sample in this paper. The main idea is to explore the possibility of using recycled materials to make the acceptable foam products. The recycled polypropylenes showed the lower melt strength due to the disentanglement. However, the viscosity at a high shear ra...

Waxes are a commonly encountered precipitate that can result in gelation of crude oils and cessation of flow in pipelines. In this work we develop a model wax-oil system that exhibits rheological behavior similar to waxy crude oils encountered in production scenarios. To study the consequences of gelation on the rheology of the model system we perform simultaneous measurements of the bulk flow ...

In this work, we aim to prepare polymer nanocomposites by the dispersion of multiwall carbon nanotube (MWCNT) in aqueous solution using amphiphilic block copolymers. First, we report our success in wrapping MWCNT with amphiphilic block copolymers in aqueous solution. We selected poly(ethylene oxide) (PEO) as the hydrophilic block because of its strong affinity for water and its easiness synthes...

When suspensions involving rigid rods become too concentrated, standard dilute theories fail to describe their behavior. Rich microstructures involving complex clusters are observed, and no model allows describing its kinematics and rheological effects. In previous works the authors propose a first attempt to describe such clusters from a micromechanical model, but neither its validity nor the ...

OF THESIS THE RHEOLOGICAL IMPACT OF ACTIVATION ON THE FLOW BEHAVIOR OF NEUTROPHILS Previously, it was reported that the morphological changes (pseudopod projection) that circulating neutrophils adopt due to cell activation raises peripheral vascular resistance by disrupting microvascular rheology. Studies utilized murine muscle preparations to link neutrophil pseudopod formation to cell activat...

The aim of present study was to evaluate the effect of adding whey protein concentrate (WPC) as a fat replacer in the rheological properties of yogurt. Whole yogurt and nonfat yogurt with 0 %, 1.5 %, 3.0 % and 4.5 % of WPC were developed and available. The steady and dynamic shear rheological properties were determined using a HAAKE MARS rheometer at 10 °C with a sensor stainless steel double g...

Pistachio paste is produced from ground roasted kernel. This study focused on the influence of the milling process on colloidal stability, rheological behavior and color of pistachio paste. The colloidal stability of pistachio paste samples increased with a reduction of particle size from 31.4 to 15.10µm. The Herschel-Bulkley model was found to be the best model to describe the flow behavior of...

The blood serum rheological properties can open the door to many investigators to find the convenient therapy for many cases of radiation exposure. The present study aimed to investigate the rheological properties of rat blood serum at wide range of shear rates after whole body irradiation with 75Gy gamma radiation dose in vitro. Thirty healthy male Wistar-Kyoto rats weighing 200 gm were used i...

During casting of aluminum alloys, the partially solidified material is submitted to thermally induced strains that can lead to severe casting defects, such as hot tearing. In this work, carried out in the frame of the European project VIR[CAST], the rheological behavior of a partially solidified AA5182 aluminum alloy has been investigated in order to provide constitutive equations to predict h...