Brookfield R/S Coaxial Cylinder Rheometer - Manual (Page 68)

Brookfi eld Engineering Labs., Inc. Page 68 Manual No. M08-219-B1211
D.1.4 Editing and Running Programs
As detailed in the R/S Rheometer operation manual, stand-alone programs can be written
under the Section VI.6.2: Utilities
→ Edit Programs menu for the R/S-SST+ to facilitate fast
test turnaround.
The two test methods that are most often used to evaluate soft solids with the R/S-SST+ are the
Constant Rate Test and the Creep Test.
D.2.1 The Constant Rate Test
For products like: Stiff pastes, slurries, set gels, waxes.
Properties measured: Yield stress or torque, equilibrium stress strain at yield, rigidity
modulus.
Description: In the constant rate test, the vane is rotated at a constant low rotational rate (typically
0.1 to 0.5 rpm) and the torque or stress is measured against time, rotational angle or strain.
Example method: Constant rotation at 0.2 rpm, linear data collection, 60 data points over 60
seconds. A V30-15 vane (30 mm high by 15 mm across) is used in an open confi guration (see
Section D.3.3: Setting Up Vanes).
Figure D-3
D.2 Getting Started in Soft Solids Testing