1. D. R. Paul, S. Newman, eds., ‘‘Polymer Blends’’, vols. 1 and 2, Academic Press, San Diego (1978).
2. O. Olabisi, L. M. Robeson, M. T. Shaw, ‘‘Polymer-Polymer Miscibil- ity’’, Academic Press, New York (1979).
3. D. R. Paul, J. W. Barlow, H. Keskkula, Encyclopedia of Polymer Science and Engineering, 2nd ed., H. F. Mark, C. G. Overberger, G. Menges, eds., Wiley Interscience, New York, 12, 399 (1988).
4. S. Krause, J. Macromol. Sci. Rev. Macromol. Chem. C7, 251 (1972).
5. M. L Huggins, J. Chem. Phys. 9, 440 (1941).