Formulation of materials containing oils, fats, or waxes is complex. These products may undergo phase transitions under thermal stress and are likely to be the source of heterogeneities appearing during manufacturing, blending, or storing. An unpredicted melting, crystallization, or polymorphic transition when products are thermally stressed could directly affect product quality and be a source of visible deterioration of the product.
Reproducing temperature conditions that products are exposed to during their life cycle, and thus performing accelerated thermal aging, is achievable with Rheolaser Crystal. Accelerated thermal aging (heating and cooling cycles) enables the study of thermal stability in an accelerated period while reproducing temperature conditions that products go through during their life cycle.
Rheolaser Crystal allows detecting any microstructure changes, at the nanometer scale, during thermal stress by an optical method: Multi-speckle Diffusing Wave Spectroscopy by monitoring the Micro-Dynamics of the sample.
Measurement at rest (no mechanical stress)
Viscoelastic properties vs. time
Easy sample handling and data treatment
Micro-Dynamics is measured by MultiSpeckle Diffusing Wave Spectroscopy (MS-DWS). Micro-Dynamics Evolution is the integration of the Micro-Dynamics signal, providing characteristic temperatures of the structure evolution. This corresponds to the speed of change at the microstructure scale in the sample, that allow for phenomena such as phase transitions or structure rearrangement to be detected.
This technology allows a non-contact analysis of macroscopic samples, monitoring any structure evolutions, through reduced sample handling and preparation to minimize the risk of sample damaging.