Rheological analysis laboratory
Would you like to characterize the physico-chemical flow properties of your materials through rheological analysis
What is rheological analysis?
L’analyse rhéologique est l’étude du comportement des matériaux lorsqu’ils sont concernés par des déformations et des écoulements, sous l’effet de contraintes extérieures comme la pression ou la force.
Elle se concentre sur la manière dont les matériaux se déforment ou s’écoulent en réponse à ces contraintes, combinant les disciplines de la mécanique des fluides, de l’élasticité et de la plasticité.
La rhéologie concerne les matériaux viscoélastiques, dont le comportement combine à la fois des propriétés visqueuses et élastiques.
Why carry out a laboratory material rheological analysis?
Carrying out a rheological analysis of materials in the laboratory makes it possible to identify and quantify the viscoelastic, viscous, and elastic properties of materials, providing insights for many industrial and research applications.
For example, rheological data guide the optimization of production processes, material selection, and product design by ensuring the desired quality and performance.
In the pharmaceutical and cosmetics industries in particular, understanding rheology helps develop products with the specific textures and flow properties required to meet consumer expectations.
Thus, laboratory rheological analysis plays a role in quality control, innovation, and technical problem-solving.
Our rheology services
Rheological study of a hydrogel
Characterization of magnetorheological oil
Detection of nanoparticles in powders
Rheological analysis on powder
Determination of the viscosity index of a PET
Viscosity measurement and density
The FILAB laboratory carries out the rheological analysis of your materials
Our rheology equipment
Viscometer
Rheometer
Testing methodologies and rheological models
Polymer rheology by the FILAB laboratory
The rheology of polymers is the study of the deformation and flow of materials under the effect of stress and temperature. Thus, depending on the nature of the materials (polymers, powders, oils, resins, paints…) and their properties, interactions with their environment can be endless. It is therefore essential for manufacturers to analyze the material’s ability to flow in order to make the best possible use of it in the production process.
Indeed, understanding the rheology of polymers is important for the development and manufacturing of many products, such as plastics, rubbers, adhesives, coatings, and composite materials. It is also important in fields such as medicine, where the rheological properties of polymers play a key role in the development of materials for implants and medical devices.
Viscosity versus rheology
Rheology is the science that studies the behavior of materials in flow, the stresses required to deform them, as well as the structural changes that result.
While viscosity is a key property measured in rheology, it is not the only relevant information. Other characteristics, such as plasticity, elasticity, and elongation, make it possible to analyze the physical structures of fluids and semi-solids in depth, and to address complex industrial challenges.
Unlike viscosity, which is an intrinsic property of Newtonian fluids such as water, oils, or gases, most industrial products are non-Newtonian. Their viscosity changes depending on the stresses applied, and their elasticity reflects their molecular structure. Understanding the behavior of your fluid is therefore essential, and rheology provides the tools needed to achieve this.
Material deformation and flow
Material deformation and flow are issues related to the characterization of materials under stress.
- The deformation of a material refers to a change in the shape or volume of a material in response to a force. There are two main types of deformation: elastic and plastic. Elastic deformation is temporary, meaning the material returns to its original shape once the force is removed. Plastic deformation, on the other hand, is permanent, so the material does not regain its initial shape after the force is removed.
- The flow of a material refers to the continuous movement of a material under the effect of an applied force. It is a characteristic mainly associated with fluids, although some solids can also flow under certain conditions, particularly thermal ones. Flow is influenced by the viscosity of the material.
Knowing how a material deforms and flows can help predict its behavior in load-bearing structures, in the formulation of medicines or cosmetic products, and in the design of industrial processes.
FAQ
Rheological analysis can be carried out on a wide variety of materials:
- Polymers: polymers, whether natural or synthetic, are often studied for their viscoelastic behavior, which combines the properties of elastic solids and viscous fluids.
- Complex fluids: this includes emulsions, suspensions, gels, and non-Newtonian fluids (whose viscosity changes depending on the applied stress), which are common in the food, cosmetics, and pharmaceutical industries.
- Chemicals and petroleum products: oils, lubricants, and other chemicals are studied to ensure their performance under different temperature and pressure conditions.
Les matériaux élastiques se caractérisent par leur capacité à retrouver leur forme originale après avoir été déformés. Ce comportement élastique est temporaire et disparaît une fois la force retirée, avec des exemples typiques incluant le caoutchouc et l'acier, dans ses limites d'élasticité.
Les matériaux visqueux, en revanche, ne reprennent pas leur forme d'origine après l'application d'une force. Leur déformation continue tant que la force est appliquée, illustrée par des substances comme l'huile, où la viscosité détermine la résistance au mouvement.
Les matériaux viscoélastiques combinent les propriétés élastiques et visqueuses, pouvant se déformer sous une charge et récupérer leur forme initiale lentement une fois la charge retirée. Ce comportement dépend du temps, mélangeant récupération élastique et déformation visqueuse, comme observé dans certains polymères.
Rheological analysis of polymers plays a crucial role in understanding their physical properties and in optimizing their use in various applications.
- Rheological analysis helps optimize polymer processing conditions, such as extrusion and injection molding. By understanding the viscoelastic behavior of the polymer, manufacturers can adjust process parameters to improve efficiency, reduce defects, and ensure the quality of the final product.
- Polymer composites, which combine polymers with reinforcements such as glass fibers or nanoparticles, offer enhanced properties such as mechanical strength and durability. Rheological analysis makes it possible to understand how the addition of these reinforcements affects the material’s behavior, thereby facilitating the development of composites with targeted properties.
- Thermal stability is essential for polymers used in environments exposed to high temperatures. Rheological analysis at different temperatures makes it possible to assess how the material’s viscoelastic properties change with temperature, thus helping to select suitable polymers.
- Polymers are often used as thickening agents, stabilizers, or release controllers in cosmetic and pharmaceutical formulations. Rheological analysis helps to understand how polymers affect the viscosity and flow behavior of formulations, making it possible to develop products with precise textures and properties.
The rheological analysis of polymers is essential for guiding research and development, optimizing manufacturing processes, and designing innovative products that meet the specific needs of industries and consumers.
