Abstract
AbstractThe porous nature of poly(vinyl chloride) (PVC) brings along the problem of residual vinyl chloride in the final product. Stripping techniques are developed to eliminate vinyl chloride to the desired levels. After a certain extent of monomer removal, the stripping rate of vinyl chloride is limited by diffusion. Therefore, the diffusion characteristics of vinyl chloride from PVC slurries was investigated. Stripping was carried out at the boiling point of water where the generated steam was used as a carrier substance. The boiling point of water was changed by elevating the pressures. The dependence of diffusion on concentration is put forward and the activation energy of diffusion was calculated.
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