The value of the interaction parameter X in dilute polymer solutions is usually higher than would be expected on the basis of simple theory. This is caused by a large entropic contribution, for which there is, as yet, no theoretical explanation. In this paper the results are presented of a study of the behaviour of the energetic and entropic contributions to Z. It is shown that the two contributions are closely correlated and exhibit qualitatively similar molecular-weight dependences. These observations may guide future theoretical efforts towards the understanding of the thermodynamic phase behaviour of polymer solutions
Посилання на статтю:
Some observations on the behaviour of the thermodynamic interaction parameter in dilute polymer solutions / M. A. van Dijk* and A. Wakker // Polymer. – 1993. – Vol 34. – P. 132-137.