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Problems associated with using conventional dynamic mechanical rheological testers (DMRT) in the viscoelastic measurement of rubber properties include sample-preparation complexities and long sweep-test times. A new DMRT, the RPA 2000, requires no difficult sample-preparation procedures, allows samples to be kept under pressure during testing and supports single-test before-, during- and after-cure testing of samples., Rubber has both viscous and elastic responses to deformation. A viscous response is proportional to the rate of deformation while an elastic response is proportional to the amount of deformation. [...]

New rheometer and Mooney technology About 18 months ago Monsanto introduced prototypes of three totally new instrument designs - an oscillating disk rheometer (ODR 2000), a rotorless or moving-die rheometer [...]

The capillary rheometer is an improvement on the more common melt flow index and melt flow rate machines as it has been found to better address more advanced moulding and extrusion applications. This more complex machine can be used to measure the flow properties of a material over the full range of rates, geometry, forces and temperatures during the actual conversion of thermoplastic materials from pellets into moulded parts. It also provides other applications, such as grading polymers, process control optimization, temperature sensitivity, thermal stability and processing effects.

Partial pressures controlled in a reactive system. Reactive-deposition processes, which apply wear and decorative coatings, often use nitrogen, oxygen, and argon. Matching gas input flow to process consumption rate is [...]