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Kinetic study of dissolution of poly(vinyl chloride) in tetrahydrofuran cyclohexanone, cyclopentanone, and N,N-dimethylformamide

L. Lapčík, V. Kellö, and J. Očadlík

Department of Physical Chemistry, Slovak Technical University, 88O 37 Bratislava


Abstract:  The kinetics of dissolution of poly (vinyl chloride) (Lonza G) in tetrahydrofuran (/), cyclohexanone (II), cyclopentanone (III), and A/^iV-dimethylformamide (IV) was studied. The investigations with individual solvents were carried out in the following temperature ranges: 15 — 30°C (/), 40 — 70°C (II), 30-60°C (III), and 30-50°C (IV). The values of induction periods of the diffusion process of dissolution tq and the velocity of dissolution uOC of poly(vinyl chloride) in the following solvents are presented. On the basis of the measured values of tQ and uOC the values of mean integral mutual diffusion coefficients D as well as the mean activation energies of the diffusion processes of swelling, dissolution, and mutual diffusion were calculated for particular temperature ranges. The comparison between the values of activation energy of mutual diffusion showed that the following order of the solvents under investigation could be established according to the decreasing activity with respect to the dissolution of PVC: tetrahydrofuran > cyclohexanone > cyclopentanone > N,N- dimethy Iformamide.

Full paper in Portable Document Format: 272a239.pdf


Chemical Papers 27 (2) 239–248 (1973)

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