Abstract
Various molecular parameters of the resulting polymer, such as number- and weight-average degrees of polymerization and polydispersity index, were derived for the ionic polymerization with a three-state mechanism. Numerical calculation indicated that the molecular weight distribution of the resultant polymer is rather narrow at high monomer conversion even though the three coexisting species possess rather different reactivities, and that additional foreign counterions result in a narrower molecular weight distribution.
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References
Müller, A. H. E., Carbanionic polymerization: Kinetics and thermodynamics, inComprehensive Polymer Science (eds. Allen, G., Bevington, J. C.), Oxford: Pergamon Press, 1988, 3:387.
Matyjaszewski, K., Pugh, C., Mechanistic aspects of cationic polymerization of alkenes, inCationic Polymerizations: Mechanisms, Synthesis, and Applications (ed. Matyjaszewski, K.), New York: Marcel Dekker, Inc, 1996, Chapt. 3, p. 137.
Coleman, B. D., Fox, T. G., A multistate mechanism for homogeneous ionic polymerization (2)—The molecular weigh distribution,J. Am. Chem. Soc., 1963, 85: 1241.
Szwarc, M., Hermans, J. J., Molecular-weight distribution in a nonterminated polymerization involving living and dormant polymers,J. Polym. Sci., Part B, 1964, 2: 815.
Figini, R. V., Statistical calculations about the growth process of polymer chains with alternating activity,Makromol. Chem., 1964, 71: 193.
Figini, R. V., Theoretical analysis of molecular-weight distributions occurring in a two-way propagation mechanism and its application to the anionic polymerization of styrene,Makromol. Chem., 1967, 107: 170.
Böhm, L. L., Calculation of the molecular heterogeneity of living polymers during the concurrent growth of end groups of different reactivities,Z. Phys. Chem. (Frankfurlt), 1970, 72: 199.
Böhm, L. L., Calculation of the molecular weight distribution of living polymers during competitive growth of terminal groups of different reactivities,Z. Phys. Chem. (Frankfurt), 1974, 88: 297.
Yan, D., General kinetic model of imperfect lining polymerization (1)—Stationary state theory,Polymeric Materials Science & Engineering, 1997, 13(2): 1.
Yan, D., Hai, D., General kinetic model of imperfect lining polymerization (2)—Nonsteady state approach,Polymeric Materials Science & Engineering, 1997, 13(3): 1.
Yan, D., Jiang, H., Fan, X., Kinetic model of living radical polymerization,Macromol. Theory & Simul., 1996, 5: 333.
Müller, A., Zhuang, R., Yan, D. et al., Kinetic analysis of living polymerization processes exhibiting slow equilibria (1)—Degenerative transfer (direct activity exchange between active and dormant species) in group transfer polymerization,Macromolecules, 1995, 28: 4326.
Müller, A., Yan, D., Zhuang, R. et al., Kinetic analysis of living polymerization processes exhibiting slow equilibria. (2)—MWD for group transfer polymerization with constant monomer concentration and activity exchange between living and dormant species,Macromolecules, 1995, 28: 7335.
Yan, D., Jiang, H., Dong, H. et al., Kinetic analysis of living polymerization processes exhibiting slow equilibria (5)— Effect of monomer transfer in cationic polymerization and similar living process,Macromolecules, 1996, 29: 5065.
Yan, D., Dong, H., Ye, P. et al., Kinetic analysis of living polymerization processes exhibiting slow equilibria (6)— Cationic polymerization involving covalent species, ion pairs, and free cations,Macromolecules, 1996, 29: 8057.
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Project supported by the National Natural Science Foundation of China (Grant No. 29474163).
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Yan, D., Ye, P. & Zhang, H. Kinetic model of living ionic polymerization with three active species. Sc. China Ser. B-Chem. 41, 278–284 (1998). https://doi.org/10.1007/BF02879708
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DOI: https://doi.org/10.1007/BF02879708