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Showing 1 to 14 of 14 for “"Capillary Rheometer"”.
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INVESTIGATING RHEOLOGICAL TECHNIQUES TO MODEL AND PREDICT OPERATING CONDITIONS OF A SINGLE SCREW EXTRUDER WITH INTERNAL RESTRICTIONS
… predicting extrusion conditions. Both off-line capillary rheometry and in-line extruder fed rheometry techniques have been used to model rheology of materials during extrusion. Investigations on use of an off-line capillary rheometer to model apparent viscosity of full fat soy flours revealed …
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Extrusion honing using mixtures of polyborosiloxanes and grit
… using a concentric cylinder, a slit-die and a capillary rheometer. The shear history of the polyborosiloxane prior to testing with the capillary rheometer was found to significantly affect the results produced. At shear strain rates up to 100 s-1 and a temperature of 30°C the rheology of the …
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Capillary rheometry of soy isolate dough
… (Promine-D) dough is determined using an Instron capillary rheometer at 298K, 333K and 363K. Thermal transitions of 10 to 100% soy isolate dough are measured using a Perkin-Elmer Differential Scanning Calorimeter (DSC-2) over 310 to 350K. The observed behavior of the soy isolate doughs is …
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On-line shear and extensional rheometry of polymer melts in the extrusion process.
A novel on-line capillary rheometer (OLR) was used to examine the shear and extensional characteristics of polyolefin melts during twin screw extrusion (TSE). Comparisons with off-line rheometry were made using a twin-bore capillary rheometer and a modular in-line slit die rheometer (ILR) provided …
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On-line shear and extensional rheometry of polymer melts in the extrusion process.
A novel on‑line capillary rheometer (OLR) was used to examine the shear and extensional characteristics of polyolefin melts during twin screw extrusion (TSE). Comparisons with off‑line rheometry were made using a twin‑bore capillary rheometer and a modular in‑line slit die rheometer (ILR) provided …
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Mold filling characteristics and molecular orientation in injection molding of liquid crystalline copolyesters of poly (ethylene terephthalate)
… terephthalate) using Instron model 3211 capillary rheometer. Two copolyesters of PET modified with 60 and 80 mole percent parahydroxy benzoate were examined. Melt viscosities were measured as a function of temperature and wall shear rates. Mold filling characteristics were investigated by …
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The Effects of Processing Conditions on Thermoplastic Prototypes Reinforced with Thermotropic Liquid Crystalline Polymers
… from long fiber TLCP reinforced strands using a capillary rheometer in order to study the effects of capillary diameter, capillary L/D, and apparent shear rate on the tensile properties.
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The Shear and Extensional Rheology of Polymer Dispersions
… data was obtained using the rotational and capillary rheometer. This is to ensure that a range of shear rates can be explored for rheological behaviours. A filament thinning rheometer was used to examine the fluid behaviour in the extensional regime. Using the experimental data, a numerical …
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Rheology of molten polystyrene with dissolved gases
… (HFC) refrigerants. A modified pressurized capillary rheometer was employed for the viscosity measurement of molten polystyrene with dissolved gases under elevated pressures and at various temperatures. Experimental results show a significant reduction of viscosity due to dissolved gas, …
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Analysis of sintered WC-TIC-6CO by using powder metallurgy process
… The rheological behavior was evaluated using capillary rheometer and it was conclude that all feedstock exhibit pseudoplastic behavior which is suitable to be injected where the sample with 0.75 wt. % TiC with 150ºC had the best rheological properties with activation energy of 37.68 kJ/mol, …
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Establishing the Conditions for Stable Extrusion of Melt Spun Polyacrylonitrile with Water Based Plasticizers
… chamber was designed and attached to the capillary rheometer in order to prevent the foaming and evaporation of plasticizers during the viscosity experiments. Both steady-shear and time-dependent viscosity measurements were conducted. The rheological measurement results indicate that PAN …
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Rheology of Filled and Unfilled Polyurethanes for Reactive Extrusion-Based Applications
… stepwise changes in strain on a torsional photorheometer, optionally applying UV light in the third interval, and then quantifying the contribution of UV light towards process-relevant recovery parameters. Resultingly, the threshold of solid particulate fillers required for UV light to improve …
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Investigation of the oxidative degradation mechanisms and melt stabilisation of a new generation metallocene polytehylene
… experienced during extrusion using a twin-bore capillary rheometer. Capillary rheometric measurements, which determine the viscous and elastic properties of polymers, have shown that both polymers are shear thinning but the m-LLDPE has a higher viscosity than z-LLDPE and the extent of reduction …
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Development of multifunctional polymer composites with self-healing capability
… are reported in the fourth subchapter. From the capillary rheometer analysis, it was possible to assess that the addition of E-GMA improved both the melt strength (MS) and the breaking stretching ratio (BSR). The enhancement of these parameters reflected better processability and an improved …