calculating intrinsic viscosity from melt flow index

The melting process and the material behavior during the measurement can be observed live directly on the instrument and through the ZwickRoell testXpert testing software. The intuitive and workflow oriented touch operation allows the user to easily switch between the instrument and the PC. Based on this data, the system then selects the best control options-travel distance or time based control-and thus sets the optimal measuring interval for the MVR value to be expected. The user is also supported by the APC (adaptive process control) function, which measures the speed of the piston shortly before the actual measurement begins. This gives you the option to exclude certain measuring sections to avoid errors in the flow rate calculation. With high-resolution travel and time measurement of the ZwickRoell instruments, changes in piston speed are automatically detected. One of the key functions of the Mflow and Aflow is the detection of possible air pockets in the plastic melted mass, which temporarily increase the piston speed and lead to incorrect flow rates. Supports all common standards and methods to ISO 1133 and ASTM D1238 and ASTM D3364. The latter was developed for particularly high specimen volumes and is designed for the determination of volume and mass flow rates according to methods A, B, C and D. Our portfolio includes the manually operated, compact Cflow instrument, the modular Mflow with traditional weights, and the Aflow, a fully automated all around testing solution with electromechanical force control.

ZwickRoell offers various melt flow index testers for the determination of melt flow rates. Depending on the test method, either the mass per unit time (MFR measurement) or volume per unit time (MVR measurement) is determined. The flow property of a thermoplastic material is characterize by its melt flow index.

Consultation and Application Technology.

Specimen preparation and dimensional measurement.

Extensometers for Compression, Flexure and Components Testing.

Analog and Digital Hardness Testers to Shore.

DuraScan micro and low-load hardness tester.

Extrusion Plastometers / Melt Flow Index Testers.

Testing Machine for Tubular Biomaterials.

Biaxial Testing Machine for Biomaterials.

Electromechanical Servo Testing Actuators.

Testing machine for high test loads (E-series).

Intermediate products and finished parts.

Thermoplastics and thermosetting molding materials.

Calculating intrinsic viscosity from melt flow index