Lubricated flow elongational rheometer

Details Lubricated flow elongational rheometer Lubricated flow elongational rheometer

1993-08-04

1994-10-25

Williams, Hezron E.

Measuring and testing

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

Viscosity

G01N 1108

Patent

active

053577841

ABSTRACT:
A novel method and apparatus for measuring elongational viscosity are disclosed. It is shown that in a hyperbolic or semi-hyperbolic die geometry with lubricated flow, the elongational viscosity of a fluid can be obtained from pressure drop--flow rate data. Experimental data for polypropylene as core and polyethylene as skin material, and the calculated extensional viscosities are presented. Alternative embodiments of the novel elongational rheometer are described, including alternatives suitable for biaxial flow.

REFERENCES:
patent: H93 (1986-07-01), Matta et al.
H. C. Kim et al., "Polymer melt lubricated flow elongational rheology I. Newtonian" (to be published 1993; not prior art to this invention).
J. R. Collier et al., "Polymer Melt Elongational Rheology" (1993, unpublished)(not prior art to this invention).
Chatraei et al., "Lubrication squeezing flow: a new biaxial extensional rheometer," J. Rheol., vol. 25, No. 4, pp. 433-443 (1981).
H. C. Kim, Melt Elongational Flow Rheometry in Converging Channels, PhD Dissertation, Louisiana State University (defended Jun. 1993, not yet catalogued and shelved by Louisiana State University's Library).
Binding et al., "On the interpretation of data from converging flow rheometers," Rheol. Acta., vol. 28, pp. 215-222 (1989).
J. R. Collier et al., "Lubricated Flow Polymer Melt Elongational Rheometry," abstract in Theoretical and Applied Rheology, Proceedings of the 11th International Conference on Rheology, Brussels (Aug. 17-21, 1992)(not prior art to this invention).
Jones, "On the extensional viscosity of mobile polymer solutions," Rheol. Acta, vol. 26, pp. 20-30 (1987).
Zahorski, "The converging flow rheometer reconsidered: an example of flow with dominating extension," J. Non-Newtonian Fluid Mech., vol. 41, pp. 309-322 (1992).
James, "Flow in a converging channel at moderate Reynolds numbers," A.I.Ch.E.J., vol. 37, No. 1, pp. 59-64 (1991).
Williams et al., "On the planar extensional viscosity of mobile liquids," J. Non-Newtonian Fluid Mechanics, vol. 19, pp. 53-80 (1985).
Meissner, "Rheometer zur Untersuchung der deformationsmechanischen Eigenschaften von Kunstoff-Schmelzen unter definierter Zugbeanspruchung," Rheol. Acta, vol. 8, No. 1, pp. 78-88 (1969).
Meissner, "Dehnungsverhalten von Polyathylen-Schmelzen," Rheol. Acta, vol. 10, No. 2, pp. 230-242 (1971).
Rheometrics data sheet, "RME--Rheometrics elongational rheometer for melts" (1993) (not admitted to be prior art to this application).
H. C. Kim et al., "Polymer melt lubricated flow elongational rheology II. Power Law" (to be published 1993; not prior art to this invention).
A. Pendse et al., "Polymer Melt Lubricated Flow Elongational Rheology III. Rheometer" (unpublished, to be published 1993)(not prior art to this invention).
Crevecoeur et al., "Fibril formation in in situ composites of a thermotropic liquid crystalline polymer in a thermoplastic matrix," J. Appl. Pol. Sci., vol. 49, pp. 839-849 (1993)(not admitted to be prior art).

Affiliated with

Also associated with

Rating

Lubricated flow elongational rheometer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lubricated flow elongational rheometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lubricated flow elongational rheometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-127424