By B Monakov; Z M Sabirov; N N Sigaeva
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Additional resources for Active sites of polymerization: multiplicity: stereospecific and kinetic heterogeneity
Curves representing distribution by kinetic heterogeneity of NdCbJDASO-Al(i-C4H9)3 catalytic system at polymerization of piperylene. 7), for catalytic system with DASO taken for organic ligand the fifth type of active sites occurs forming the most lowmolecular fraction in polypiperylene. This peak intensity increases during polymerization. Other types of active sites in catalytic systems containing TBP and DASO demonstrate analogous tendency in changes of kinetic activity with the monomer conversion increase.
The Monte-Carlo method was applied  to modeling of the size change, spatial distribution of catalyst particles and adsorption of multiatomic molecules on them influence on distribution of the catalyst active sites by reactivity. 1 shows investigation results on ethylene polymerization in toluene on MgH2/TiCl4-AI(C2Hs)3 catalytic system . B. N. N. Urazbaev sites after catalyst contact with ethylene during 60 minutes was determined using 14CO probes injected to polyethylene. It is obvious that the catalytk system shows the highest activity (polymerization rate, active site concentration and polymer yield) at lower content of applied titanium and greater specific surface of the catalyst.
Multiplicity 31 polyisoprene all possible microstructures can be realized with respect to the origin of ligands surrounding atom of chromium . Contrary to chromium-containing catalytic systems, for primary lanthanide catalysts LnCb-AIR3 polybutadiene synthesis with high content (up to 98%) of 1,4-cis-units was observed. However, such catalytic systems were of low activity. Higher activity was displayed by systems with the lanthanide components representing a lanthanide halide complex with any electron-donor ligand, LnCh·3L.