Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-08T02:16:50.450Z Has data issue: false hasContentIssue false
  • English
  • Français

A Novel Rheological Microscope for Flow Studies of Thermotropic Polymers and Polymer Blends: Droplet Deformation

Published online by Cambridge University Press:  10 February 2011

P. T. Mather ,
H. R. Stüber ,
K. P. Chaffee ,
T. S. Haddad ,
A. Romo-Uribe  and
J. D. Lichtenhan
P. T. Mather
Affiliation:
Propulsion Sciences Division, USAF Phillips Laboratory, Edwards AFB CA 93524
H. R. Stüber
Affiliation:
Physics Machine Shop, U.C. Santa Barbara, Santa Barbara, CA 93106
K. P. Chaffee
Affiliation:
Propulsion Sciences Division, USAF Phillips Laboratory, Edwards AFB CA 93524
T. S. Haddad
Affiliation:
Hughes STX Corporation, Phillips Laboratory, Edwards AFB CA 93524
A. Romo-Uribe
Affiliation:
Propulsion Sciences Division, USAF Phillips Laboratory, Edwards AFB CA 93524
J. D. Lichtenhan
Affiliation:
Propulsion Sciences Division, USAF Phillips Laboratory, Edwards AFB CA 93524
Get access

Abstract

We have recently begun investigating the rheological behavior of blends containing thermotropic liquid crystalline polymers (LCPs) and isotropic polymers. To aid us in our studies, we have designed a unique instrument for simultaneous visualization of morphology evolution and rheological measurements. Rectilinear shear is used, with a top glass bar being translated relative to a fixed bottom glass bar. The sample is heated by conduction from mica heaters embedded in the substrate materials supporting the bounding glass bars. Shear forces are obtained by measuring the (small) deflection of the bottom glass bar and heating assembly which is designed to be slightly compliant in the flow direction while rigid in direction normal to the sample.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 425: Symposium I – Liquid Crystals for Advanced Technologies , 1996 , 137
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Alderman, N.J. and Mackley, M.R., Faraday Discuss. Chem. Soc., 79, 149 (1985).Google Scholar
2 Mather, P.T. and Pearson, D.S., J. Am. Chem. Soc., Poly. Prep., 33, 779 (1992).Google Scholar
3 Wu, R., Shaw, M.T., and Weiss, R.A., Rev. Sci. Instrum., 66, 2914 (1995).Google Scholar
4 Larson, R.G. and Mead, D.W., Liquid Crystals, 12, 751 (1992).Google Scholar
5 DeNeve, T., Navard, P., and Kleman, M., J. Rheol., 37, 515 (1993).Google Scholar
6 Sondergaard, K., 1995, Rheo-Physics of Multiphase Polymer Systems, edited by Sondergaard, K. and Lyngaae-Jorgenson, J. (Technomic Publishing Company) Chapter 4.Google Scholar
7 Palierne, J.F., Rheol. Acta., 29, 204 (1990).Google Scholar
8 Mather, P.T., Chaffee, K.P., Haddad, T.S., and Lichtenhan, J.D., Polym. Preprints (Am. Chem. Soc., Div. Poly. Chem.), 37, 765 (1996).Google Scholar
9 Mather, P.T., Chaffee, K.P., Haddad, T.S., and Lichtenhan, J.D., Manuscript in Preparation (1996).Google Scholar