Title

Low-Shear-Rate Capillary Viscometer for Polymer Solution Intrinsic Viscosity Determination at Varying Temperatures

Document Type

Article

Publication Date

1-1-2003

Department

Polymers and High Performance Materials

Abstract

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.

Publication Title

Review of Scientific Instruments

Volume

74

Issue

1

First Page

176

Last Page

181