Handbook of Solvents - George Wypych - ChemTech - Ventech!

378 Semyon Levitsky, Zinoviy Shulman
Figure 7.2.14. The relation between the relative heat
transfer coefficient for boiling PIB solutions in cyclohexane
and the Newtonian viscosity of the solutions
measured at T=298 K. ΔT = 16.67 K; � - PIB Vistanex
L-100 in cyclohexane, o - PIB Vistanex L-80 in cyclohexane,
x - pure cyclohexane. [Reprinted from H.J.
Gannett, and M.C. Williams, Int. J. Heat Mass Transfer,
14, 1001, Copyright 1971, the reference 57, with
permission from Elsevier Science]
Figure 7.2.15. The average bubble detachment diameter
in boiling dilute aqueous solutions of PEO. 59 ΔT = 15K.
For curves 1-3 the flow velocity v=0,5×10 -2 , and 10 -1
m/s, respectively. [Adapted, from S.P. Levitsky, and
Z.P. Shulman, Bubbles in polymeric liquids,
Technomic Publish. Co., Lancaster, 1995, with permission
from Technomic Publishing Co., Inc., copyright
1995]
smaller in size than in water and aqueous solutions of PAA.
Non-monotonous change in the heat transfer coefficient, α, with increasing the concentration
of PIB Vistanex L80 (M = 7.2×10 5 ) or L100 (M = 1.4×10 6 ) in boiling cyclohexane
has been reported. 57 The results were received in a setup similar to that described earlier. 56 It
was found that the value of α increases with c in the range 22 ppm