Extensional Rheometry (FSR, EVF and SER)

Instruments

Three extensional rheometers systems; Filament Strectching Rhemetry (FSR), Extensional Viscosity Fixture (EVF) and Sentmanat Extensional Rheometer (SER).

Analysis target

Extensional rheometry is used to characterize the ability of  polymers to form filaments or fibers. Non-linear extensional stresses are sensitive to branching or other molecular  architecture of polymer melts.

Sample prerequisites

The technique is applicable for polymer melts and solutions.

Analysis characteristics

Filament Stretching Rheometry (FSR) is a techniques in which a sample initially placed between two parallel plates is stretched into a filament by a controlled separation of the plates. A thermostated environment is surrounding the sample allowing measurements in the interval from room temperature to about 180°C.  The FSR can measure in start-up, stress-relaxation and recovery modes.

Extensional Viscosity Fixture (EVF) and Sentmanat Extensional Rheometer (SER) fixtures are avaiable to the ARES G2 rheometer for measurements in start-up mode only.

Sample requirements

Typically at least 400 mg needed.