ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Photodestruction of poly(vinyl chloride). I. Changes in transport properties and critical angle of wetting due to the exposure to polychromatic ultraviolet radiation

J. Polavka, L. Lapčík, and J. Valášek

Department of Physical Chemistry, Slovak Technical University, 880 37 Bratislava

Abstract: The influence of exposure of polyvinyl chloride) to polychromatic ul­traviolet radiation on transport properties and the critical angle of wetting was investigated. The kinetics of formation of the polymer swollen layer in the systems polyvinyl chloride)—dimethyl ketone and poly (vinyl chloride)—ethyl methyl ketone were studied. The measured values of apparent average diffusion coefficients in the system^ investigated varied within the range 5 x 10^-11—4 x 10^-10 m² s^-1 and increased with exposure in an equal manner as the activation energy of diffusion which varied in the interval 0.4—0.7 kJ mol^-1. It was found that the value of [rj] of the investigated samples increased at the first moments of the exposure to ultraviolet radiation while the critical angle of wetting of the póly (vinyl chloride) films by water decreased.

Full paper in Portable Document Format: 341a63.pdf

Chemical Papers 34 (1) 63–72 (1980)