In a method for determining the low-temperature properties of a paraffin-containing fuel, the fuel is conducted from a storage chamber through a measuring cell provided with a sieve, the measuring cell is cooled by means of a cooling device, the temperature of the fuel in the measuring cell is measured, and a fluid pressure representing the flow resistance occurring on the sieve is measured, and the temperature occurring at a defined fluid pressure set point is determined and output as a result of the method, wherein, for the pressure measurement, a defined sample amount of the fuel is abruptly delivered from the storage chamber in order to obtain a pressure pulse.

In a method for determining the low-temperature properties of a paraffin-containing fuel, the fuel is conducted from a storage chamber through a measuring cell provided with a sieve, the measuring cell is cooled by means of a cooling device, the temperature of the fuel in the measuring cell is measured, and a fluid pressure representing the flow resistance occurring on the sieve is measured, and the temperature occurring at a defined fluid pressure set point is determined and output as a result of the method, wherein, for the pressure measurement, a defined sample amount of the fuel is abruptly delivered from the storage chamber in order to obtain a pressure pulse.

The present disclosure provides a low-cost and accurate rheometer system and method capable of determining melt flow rheological properties of polymers, such as from Fused Filament Fabrication (FFF) polymeric materials. The device can include a filament feeding system, liquefier for filament melting, force transducer for measuring filament feeding force, and a temperature control system for controlling polymer melt temperatures. An electronic control system can capture data and manage operations. The system can measure a filament velocity and filament force required to extrude the FFF filament for printing. The filament velocity and force data can be used to compute data sets of melt volumetric flow relative to pressure drop across a FFF nozzle. An inverse analysis process transforms the computed data sets through nonlinear curve fitting to determine rheological parameters, independent of the customary calculation of apparent viscosity from shear stress and strain rate, that can assist in controlling the filament deposition.

The present invention relates to a method for evaluating an injection physical property of a plastic resin, and a polyethylene resin suitable for an injection molding process and, more particularly, to a novel method for evaluating an injection physical property of a plastic resin, which, when a particular plastic resin is processed by an injection process, can accurately derive injection suitability of the plastic resin and injection pressure in the injection process through a physical property value measured by using a resin specimen, and a polyethylene resin suitable for injection molding.

The present invention relates to a method for evaluating an injection physical property of a plastic resin, and a polyethylene resin suitable for an injection molding process and, more particularly, to a novel method for evaluating an injection physical property of a plastic resin, which, when a particular plastic resin is processed by an injection process, can accurately derive injection suitability of the plastic resin and injection pressure in the injection process through a physical property value measured by using a resin specimen, and a polyethylene resin suitable for injection molding.

An integrated test device adapted to perform tests on a single aliquot of a liquid sample. The test device includes a viscosity test cell adapted to perform viscosity tests on the liquid sample; a freeze point test cell adapted to perform freeze point tests on the liquid sample; a sample injection port adapted to load the single aliquot of the liquid sample into both of the viscosity test cell and the freeze point test cell, where the viscosity test cell and the freeze point test cell are connected in parallel to the sample injection port; a data processing unit to collect data from the viscosity test cell and the freeze point test cell and process the data, the data processing unit performing calculations to determine temperatures at any specified viscosity above a freeze point and checks of integrity of the viscosity measurements.

An improved version of the capillary bridge viscometer that compensates for the effect of solvent compressibility is disclosed. A novel, yet simple and inexpensive modification to a conventional capillary bridge viscometer design can improve its ability to reject pump pulses by more than order of magnitude. This improves the data quality and allows for the use of less expensive pumps. A pulse compensation volume is added such that it transmits pressure to the differential pressure transducer without sample flowing there through. The pressure compensation volume enables the cancellation of the confounding effects of pump pulses in a capillary bridge viscometer.

An improved version of the capillary bridge viscometer that compensates for the effect of solvent compressibility is disclosed. A novel, yet simple and inexpensive modification to a conventional capillary bridge viscometer design can improve its ability to reject pump pulses by more than order of magnitude. This improves the data quality and allows for the use of less expensive pumps. A pulse compensation volume is added such that it transmits pressure to the differential pressure transducer without sample flowing there through. The pressure compensation volume enables the cancellation of the confounding effects of pump pulses in a capillary bridge viscometer.

A porous micromodel network to simulate formation flows includes a substrate, two or more porous micromodels formed on the substrate and a fluid inlet formed on the substrate. The first porous micromodel defines a first fluidic flow pathway and is representative of a first hydrocarbon-carrying formation. Flow through the first fluidic flow pathway is representative of flow through the first hydrocarbon-carrying formation. The second porous micromodel is fluidically isolated from the first porous micromodel. The second porous micromodel defines a second fluidic flow pathway different from the first fluidic flow pathway. The second porous micromodel is representative of a second hydrocarbon-carrying formation different from the first hydrocarbon-carrying formation. Flow through the second fluidic flow pathway is representative of flow through the second hydrocarbon-carrying formation. The fluid inlet is fluidically configured to simultaneously flow fluid to the first fluidic flow pathway and the second fluidic flow pathway.

A porous micromodel network to simulate formation flows includes a substrate, two or more porous micromodels formed on the substrate and a fluid inlet formed on the substrate. The first porous micromodel defines a first fluidic flow pathway and is representative of a first hydrocarbon-carrying formation. Flow through the first fluidic flow pathway is representative of flow through the first hydrocarbon-carrying formation. The second porous micromodel is fluidically isolated from the first porous micromodel. The second porous micromodel defines a second fluidic flow pathway different from the first fluidic flow pathway. The second porous micromodel is representative of a second hydrocarbon-carrying formation different from the first hydrocarbon-carrying formation. Flow through the second fluidic flow pathway is representative of flow through the second hydrocarbon-carrying formation. The fluid inlet is fluidically configured to simultaneously flow fluid to the first fluidic flow pathway and the second fluidic flow pathway.