We have studied PVC polymerization filling under the action of low temperature (20°С) radical initiating system:
tri-n-butylborane-di-tert-butylperoxytriphenylantimony or oxobis(tert-bytylperoxy-triphenylantimony) in the
presence of aerosil, perlite, bismuth and iron oxides, asbestos, kaolin and chalk. It was found that effective polymer
grafting onto the filler surface takes place, with the share of the grafted polymer being 20 - 80%. Zink, aluminium,
and vanadium oxides have been shown to almost completely inhibit the PVC polymerization process. Important
factors determining high filling rates are the generation of oxygen-centered radicals in the adsorption layer, filler
structure, polymer coating thickness and the process temperature.
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