| Issue |
Europhys. Lett.
Volume 34, Number 7, June I 1996
|
|
|---|---|---|
| Page(s) | 513 - 518 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00488-0 | |
| Published online | 01 September 2002 | |
Determination of both the binodal and the spinodal curves in polymer blends by shear rheology
Foundation for Research and Technology - Hellas,
Institute of Electronic Structure and Laser,
P.O. Box 1527, 711 10 Heraklion Crete, Greece
Received:
1
February
1996
Accepted:
17
April
1996
The thermorheological complexity at low frequencies in polymer blends near
macrophase separation is quantitatively accounted for. The behaviour of both
storage, G', and loss, G'', moduli at low frequencies as the temperature,
T, approaches phase separation is due to the critical concentration fluctuations
in the one-phase region. The temperature at maximum slope of the G'
vs. T dependence at
low frequencies is identified with the cloud point curve, whereas a plot of
![$[(G'')^2/(G'T)]^{2/3}$](/articles/epl/abs/1996/16/34707/34707_tex_eq1.png)
vs. 1/T leads to the identification of the spinodal temperature.
PACS: 61.41.+e – Polymers, elastomers, and plastics / 64.70.Ja – Liquid-liquid transitions / 68.10.Et – Interface elasticity, viscosity, and viscoelasticity
© EDP Sciences, 1996
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