Abstract
The extent of adsorption of vinyl chloride monomer (VCM) on polyvinyl chloride (PVC) beads of various size was examined using the inverse gas chromatography technique at 288, 295, 303, and 313 K. The sizes of the PVC beads were 60–80, 100–120, and 150–200 mesh. On them the specific retention volumeVg(ml/g) of the injected gaseous monomer was determined.Vgdepends on the mean particle sizedof PVC beads according to the relationship logVg= (D− 3)logd, from which the mass fractalDvalues were determined between 2.95 and 2.63 depending on the temperature and the dilution of monomer. Higher temperatures (313 K) are associated with lowerDvalues (2.63–2.67), whereas lower temperatures (288 K) are associated with higherDvalues (2.87–2.95). These results suggest that the PVC behaves more as a two-dimensional material in relation to VCM adsorption at higher temperatures, whereas at lower temperatures it looks more like a three-dimensional Euclidean solid.
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