Extrudate swell rheometer and method of using same

Details Extrudate swell rheometer and method of using same Extrudate swell rheometer and method of using same

1982-09-30

1984-06-19

Goldberg, Gerald

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

73 54, 346107R, G01N 1104, G01N 1102, G01D 942

Patent

active

044547510

ABSTRACT:
A rheometer for measuring the extrudate swell of polymeric solutions. The eometer has an upper and lower transparent reservoir with a capillary tube therebetween. The flow of solution between reservoirs from upper to lower is provided by gas pressure. Initially, the swell is photographed and the lower reservoir is then filled with an immiscible Newtonian fluid. In sequence the flow is again started and a second photograph is taken. The first and second swell are measured, and the results applied to a formula to determine the first normal stress difference of the polymeric solution.

REFERENCES:
patent: 3832886 (1974-09-01), Pliskin
patent: 4157029 (1979-06-01), Leca et al.
patent: 4403502 (1983-09-01), Lindt

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