Sm. Yushkova et al., THERMODYNAMICS OF POLYVINYL-CHLORIDE INTE RACTION WITH LOW-MOLECULAR LIQUIDS, Vysokomolekularnye soedinenia. Seria A, 36(3), 1994, pp. 431-435
The changes in heats of components interaction for the model system of
low-molecular liquid-PVC were studied as functions of conditions of s
ynthesis and processing of the polymer. These conditions determine the
peculiarities of the initial PVC structure and the degree of its modi
fication after rolling. To calculate Gibbs free energy and mixing entr
opy for PVC samples with THF we used a theoretical approach based on U
NIQUAK model of solution. A conclusion is made that disordering of the
structure and decrease in packing density of PVC macromolecules occur
after passing through rolls. PVC structure plays a main role in chang
e of thermodynamic parameters of interaction with the solvent.