ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The simultaneous determination of band formation and stress relaxation behavior was carried out using a parallel glass plates apparatus for the liquid crystalline hydroxypropyl cellulose solutions. The effects of shear rate and concentration on both behavior were mainly determined. The dependence of band formation on shear rate was the same as that reported in the literature: the higher shear rate is, the more rapidly the band forms. The band formation depended on the concentration. The effect of concentration appeared to depend on the solution phase (biphase or fully liquid crystalline phase); for the biphasic solutions, the band formed rapidly with increasing concentration, whereas for the fully liquid crystalline solutions, the band formed rapidly with decreasing concentration. Qualitatively, the stress relaxation was divided into two regions; one was the first rapid relaxation process, and another was the secondary slow relaxation one. It was speculated that the band does not form in the first process, but begins to form around the beginning of the secondary process. © 1994 John Wiley & Sons, Inc.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1994.070530205
Permalink