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14 February 2017
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Teaching is concentrated in the faculties and schools, and the departments deal with research, which is also conducted by institutes and chairs, at the same time responsible for knowledge promotion.
The rheology term is defined as the study of the deformation and the flow of the materials. He would re-omit it rotational it is an analytical technique that allows to measure, among others, the viscosity and the viscoelastic properties (for example, G', G”, so δ) for an extensive range of materials, fluids, semisolids, and solids included.
During the analysis with the rheometer, the sample positions in a determinate geometry and undergoes a controlled effort, measuring the resulting deformation.
In order to request the analysis of samples for re-omits rotational, you have to put in touch with the staff responsible for the team.
It be necessary to inform of the toxicity and precautions of storage of the samples. If they do not come to search, the surpluses of sample will be destroyed in the deadline of a week from the delivery of results.
In an essay of reomits rotational the material undergoes to a cutting effort. These efforts are produced in a rotational rheometer using different geometries, like concentric cylinders (liquid samples) or parallel dishes (semisolid samples). In the case of the geometry of concentric cylinders the sample stands in the annular space between the fixed external cylinder (called cup) and the boarder (mobile rotor). In the geometry of parallel dishes, the sample positions between the fixed inferior dish and the mobile superior.
The dynamic viscosity is the main parameter that allows to establish the constitutive equations that relate effort and deformation in blade. With he would re-omit it rotational they can be obtained the curves of flow that relate the viscosity of the sample or of the effort in blade with the speed of deformation in blade.
The other mode of essay with the rheometer is the oscillatory one, in what the viscoelastic answer is monitored. Like this the modules can be obtained from storage to blade (G) and of losses (G) depending on the temperature, the frequency of deformation or depending on the time in the case of reactions that modify the viscoelastic properties of the sample.
The rotational rheometer is a very versatile team, some of its main applications are:
The acquisition of this equipment it has been co-financed for the Ministerio de Ciencia, Innovación y Universidades across the European Background of Regional Development (FEDER) and of the Plan of Recovery, Transformation and Resilience (MRR).
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