Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (10): 1460.
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GUO Wen-Li, XU Rui-Qing, WU Guan-Ying
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Abstract: There coexist at least two initiating centers.The monomodal trace of the polymer in GPCwas observed when only one active center outlives after complexing competition.In the given system IBVE/Cl2/TiCl4/toluene the complexing competition is between Cl2/TiCl4 and H2O/ TiCl4 where in the trace of water existed as residual impurity being not thoroughly removed by usual purification technique.The unstable equilibrium constants for complexation reaction of Cl2/TiCl4 and H2O/TiCl4 were determined for them as 1.9×10-10 and 8.31×10-6 respectively.The huge difference between their unstable equilibrium constants shows active complex Cl2/TiCl4 is predominate, then “living” characterastic of the polymerization is outstanding.
Key words: Cl2/TiCl4 initiating system, IBVE, Living polymerization, Cationic polymerization, UV spectroscope
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GUO Wen-Li, XU Rui-Qing, WU Guan-Ying . Cationic Polymerization of IBVE Initiated by Cl2 TiCl4/Toluene (Ⅰ)—Initiating Centers and the Role of Their Complex Competition in the Polymerization[J]. Chem. J. Chinese Universities, 1993, 14(10): 1460.
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