Low-Shear-Rate Capillary Viscometer for Polymer Solution Intrinsic Viscosity Determination at Varying Temperatures
Polymers and High Performance Materials
A low-shear capillary viscometer has been designed, constructed, and used to measure polymer solution intrinsic viscosities over temperatures ranging from 10 to 75 degreesC. The instrument is capable of detecting the small shear stress forces produced when low-viscosity fluids are subjected to very low-shear rates. Instrument performance and sensitivity were evaluated using deionized water at temperatures between 10 and 75 degreesC. The measured water viscosity values differed from the literature values by less than 1%. The viscometer was also used to determine that the intrinsic viscosity of a poly(acrylamide) aqueous solution at 29 degreesC was 17.7 dL/g. This value was in agreement with the value obtained using a Contraves Low-Shear 30 cup and bob rheometer, 17.9 dL/g. (C) 2003 American Institute of Physics.
Review of Scientific Instruments
Hester, R. D.
(2003). Low-Shear-Rate Capillary Viscometer for Polymer Solution Intrinsic Viscosity Determination at Varying Temperatures. Review of Scientific Instruments, 74(1), 176-181.
Available at: http://aquila.usm.edu/fac_pubs/4510