Normal Stress Effects in Polymer Solutions. I. Measurements in a Parallel Plate Instrument
- 1 May 1959
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 32 (5) , 471-476
- https://doi.org/10.1246/bcsj.32.471
Abstract
Results of some geometrical studies of normal stress effects in a parallel plate instrument have been discussed. The parallelism and the concentricity of two plates are necessary conditions for the quantitative measurement. The rotational velocity of a cup should be kept below about 70 rpm for the apparatus with the cup radii about 6∼8 cm. to avoid the influence of the centrifugal force. Accesses of manometer tubes with the diameter about 2 mm. cause no appreciable disturbances. The influence of side gap may also be neglected. With these experimental remarks, the normal stresses are obtained as a function of the rate of shear.Keywords
This publication has 4 references indexed in Scilit:
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- On Normal Stresses, Flow Curves, Flow Birefringence, and Normal Stresses of Polyisobutylene Solutions. Part II. ExperimentalTransactions of the Society of Rheology, 1957
- Some Rheological Properties of Concentrated Polyisobutylene SolutionsJournal of Applied Physics, 1954
- The hydrodynamics of non-Newtonian Fluids - III. The normal stress effect in high-polymer solutionsPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1953