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By B Monakov; Z M Sabirov; N N Sigaeva

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These maxima relate to, at least, four types of active sites in the system with TBP and to five types with DASO. 7. B. N. N. 6. 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.

Czech. Chern. , 1993, vol. 58(10), p. 2349. , Zh. Prikl. , 1986, vol. 59(1), p. 227. , Acta Polymerica, 1983, vol. 34(11/12), p. 667. Chapter 2. 1. HETEROGENEITY OF ACTIVE SITES IN HETEROGENEOUS POLYMERIZATION PROCESSES Similar to other chemical reactions, polymerization processes may be performed in both homogeneous and heterogeneous systems. There are different reasons for heterogeneity. For example, in the case of radical polymerization, a polymer or an initiator can be insoluble in the polymerization mixture or rather complex insoluble catalytic systems participate m ionic-coordinate polymerization processes.

17(2) p. 72. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. , Doklady AN SSSR, 1956, vol. 110(5), p. 789. , Macromol. , 1971, vol. 144, p. 97. , Collect. Czech. Chern. , 1984, vol. 49(1 0), p. 2269. , Macromol. Chern. , 1998, vol. 199, p. 1025. A. Karpov NIFKhl, Moscow. V. , Int. Symposium on Ionic Polymerization, Paris: Book Abstracts, 1997. , Macromol. Chern. , 1997, vol. 198, p. 3855. , Vysokomol. , 1988, vol. 30A(8), p. 1623. , Vysokomol. , 1991, vol. 33A(8), p. 1753. , Polym. , 1984, vol.

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