Handbook of Solvents - George Wypych - ChemTech - Ventech!

384 Semyon Levitsky, Zinoviy Shulman
collapse in a viscoelastic liquid (Section 7.2.1). In systems with LCST this effect can be still
enhanced due to phase separation, induced by interaction of the liquid with high-temperature
body. Additional reason that governs the decrease in heat removal rate at quenching is
connected with reduction of heat conductivity in aqueous solutions of polymers with
growth of concentration of the high-molecular additive.
After the body temperature is lowered sufficiently, the film boiling gave way to the
nucleate one. According to data, presented in the previous section, over the polymer concentration
ranges, typical for high-molecular quenchants, the α value must decrease in comparison
with water. In fact, this is normally observed in experiments. Rise of the
temperature, characterizing transition from nucleate boiling to convective heat transfer, is
associated with the increase in liquid viscosity.
Abbreviations
HEC hydroxyethylcellulose
LCST lower critical solution temperature
PS polystyrene
PIB polyisobutylene
PAA polyacrylamide
PEO polymethyleneoxide
POE polyoxyethylene
PVA polyvinyl alcohol
TTS time-temperature superposition
REFERENCES
1 A.B.Bird, R.C.Armstrong, and O.Hassager, Dynamics of polymeric liquids, J.Wiley & Sons, New York,
1977.
2 R. M.Christensen, Theory of viscoelasticity. An introduction, Academic Press, New York, 1982.
3 G. Astarita, and G. Marucci, Principles of non-Newtonian fluid mechanics, McGraw-Hill Book Co.,
London, 1974.
4 L. D. Landau, and E. M. Lifshits, Statistical physics, Pergamon Press, Oxford, 1980.
5 C. Truesdell, A first course in rational continuum mechanics, Johns Hopkins University, Baltimore, 1972.
6 K. Walters, Rheometry, Chapman and Hall, London, 1975.
7 C.J.S. Petrie, Elongational flows, Pitman, London, 1979.
8 P. J. Carreau, and D. De Kee, Can. J. Chem. Eng., 57, 3 (1979).
9 Z.P. Shulman, and B. M. Khusid, Non-stationary convective transfer processes in hereditary media,
Nauka i Technika, Minsk, 1983.
10 K.M. Baid, and A. B. Metzner, Trans. Soc. Rheol., 21, 237 (1977).
11 R.Y. Ting, J. Appl. Polym. Sci., 20, 1231 (1976).
12 J.M. Dealy, Polym. Eng. Sci., 11, 433 (1971).
13 M.M. Denn, and G. Marrucci, AIChE J., 17, 101 (1971).
14 J.D. Ferry, Viscoelastic properties of polymers, J.Wiley & Sons, New York, 1980.
15 M. Doi, and S. F. Edwards, The theory of polymer dynamics, Clarendon Press, Oxford, 1986.
16 P.-G. de Gennes, Scaling concepts in polymer physics, Cornell University Press, Ithaca and London, 1979.
17 T. W. Spriggs, Chem. Eng. Sci., 20, 931, (1965).
18 G. V. Vinogradov, and A. Ya. Malkin, Rheology of polymers, MIR, Moscow, 1980.
19 Ya.I. Frenkel, Kinetic theory of liquids, Dover Publications, New York, 1955.
20 V.P. Budtov, and V.V. Konsetov, Heat and mass transfer in polymerization processes, Khimiya,
Leningrad, 1983.
21 D. W. Van Krevelen, Properties of polymers: correlations with chemical structure, Elsevier Publishing
Co., Amsterdam, 1972.
22 R. S. Marvin, and J. E. McKinney in Physical Acoustics: Principles and Methods, vol.II, p.B,
W. P. Mason, Ed., Academic Press, New York, 1965, pp. 193-265.
23 B. Froelichb, C. Noelb, and L. Monnerie, Polymer, 20, 529 (1979).
24 D. Pugh, and D.A. Jones, Polymer, 19, 1008 (1978).