Apparatus for measuring the representative parameters of rheological properties of viscoelastic fluids
US4316383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1980 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Jan 14, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/442
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for determining rheological parameters of viscoelastic fluids is provided. The apparatus comprises two similar cylinder-piston assemblies ending at identical flow orifices. The pistons are pushed conjointly by a motor at an adjusted speed. A differential manometer is arranged between the cylinders immediately upstream of the orifices. One of the cylinders contains fluid to be studied and the other a Newtonian comparison fluid. The strain rates of the fluids are defined by the adjusted flow rates, and the pressure differential expresses elongation stress of the viscoelastic fluid. This apparatus is applicable in the rheological study of dilute solutions of macromolecular compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.