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Photooxidation of polyvinyl-chloride) Changes in physical-properties due to the exposure to corona discharge

J. Polavka and L. Lapčík

Department of Physical Chemistry, Faculty of Chemical Technology, Slovak Technical University, CS-812 37 Bratislava

 

Abstract: The influence of exposure of polyvinyl chloride) (PVC) to corona dis­charge on physical properties was investigated. It has been found that transport process of diffusion of the cyclohexanone into the PVC obeys the second Fick's law. The measured average apparent diffusion coefficients of the studied system vary in the interval (0.9—2.5) x 10-10 m2 s-1 and increase with exposure in an equal manner as the activation energies of diffusion which vary in the interval (27.6—32.8) kJ mol-1 There have been deter­mined: limiting angle of wetting Θ, temperature of glass transition Tg, and absorption in the UV region. The dependence of the physical properties on time of exposure of PVC to corona discharge is described. The changes in the physical properties after the low-temperature plasma application are similar and much faster than the photochemical changes caused by ul­traviolet radiation.

Full paper in Portable Document Format: 432a259.pdf

 

Chemical Papers 43 (2) 259–266 (1989)

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