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The intrinsic viscosity data reported in the literature for ethylene-butylene copolymers in several solvents are used to estimate the X parameter characterizing the polymer-solvent interaction. The dependences of this parameter on the copolymer composition display unexpectedly pronounced minima which indicate a repulsive interaction of ethylene and butylene units. In view of their chemical similarity, which makes the enthalpy contribution to the interaction low, the behaviour is assigned to entropy-of-mixing effects.

Посилання на статтю:

Note on a potential contribution of entropy to the interaction parameter for dissimilar units in copolymers / Danuta Staszewska* and Miloslav Bohdanecky // Polymer. – 1992. – Vol 33. – P. 4878-4879.

Note on a potential contribution of entropy to the interaction parameter for dissimilar units in copolymers - Завантажити.