The Rosand RH2000 capillary rheometer from NETZSCH is a compact system with the ability to fulfill a majority of the test requirements in capillary rheometry. The rheometer brings together several sophisticated features linked with larger floor-standing models, and can be set up for research measurements and Quality Control applications.
Features and Benefits
The Rosand RH2000 benchtop capillary rheometer offers extremely versatile configuration options and measurement capabilities for an extensive range of applications — from foodstuffs to inks and coatings, and from polymer melts to pharmaceutical processing.
- Maximum speed (up to 1200 mm/minute) and maximum drive force (up to 20kN) capabilities allow an extensive array of shear rates, and correlation with several real material processing conditions.
- Single- and twin-bore barrel options for low-cost regular measurement capability and dual measurements for concurrent evaluation of absolute extensional (elongational) viscosities and shear viscosity.
- The exclusive swivel head design enables the rheometer barrel to be easily accessed for instrument cleaning and sample loading.
- Rigid single-piece cantilever frame design offers very high mechanical strength and rigidity for a small benchtop unit.
- Extensive range of high accuracy tungsten carbide dies as standard to cover all test types as well as materials.
- Readily exchangeable melt pressure transducers to include complete test needs — designed with low-noise, triple-stage amplifiers for improved measurement sensitivity at the die entrance.
- User-friendly Flowmaster software with a comprehensive range of analyses and tests for shear and extensional viscosity, as well as determining sample stability, wall slip, and melt fracture.
- Proprietary bi-modal speed control algorithms to maximize shear rate measurement range for a specific die.
- Wide array of optional barrel materials and sizes to allow measurement of thermally sensitive, aqueous-based, or chemically aggressive samples.
- Nitrogen purge option to minimize degradation of the sample.
- Accurate sample temperature control using three separate zone heaters, with platinum resistance thermometers of 10 times DIN accuracy. High temperature (maximum of 500 °C) and cooling coil options are also possible.
- Die swell measurement accessories for elastic samples evaluation.
Key Applications
- Simulating extensional viscosity dominated processes like blow molding, film blowing, thermoforming, and fiber spinning
- Identifying polymer instabilities like melt fracture and thermal degradation
- Evaluating the extrusion behavior for processes like hot melt extrusion and injection molding
- Characterizing rheology of suspension or polymer over a wide array of temperatures and shear rates
- Assessing material behavior at process-relevant shear rates, like printing and high-speed coating applications
- Measuring material elasticity and related properties like die swell