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Citation: Zhou Guangbin, Xu Guojin, Li Jingjie. STUDIES ON THE POLYMERIZATION SYSTEM OF BUTADIENE/TOLUENE/n-BUTYL LITHIUM-POTASSIUM BUTOXIDE Ⅱ. THE REACTION KINETICS[J]. Chinese Journal of Applied Chemistry, ;1988, 5(1): 21-26. shu

STUDIES ON THE POLYMERIZATION SYSTEM OF BUTADIENE/TOLUENE/n-BUTYL LITHIUM-POTASSIUM BUTOXIDE Ⅱ. THE REACTION KINETICS

1.
1. South China Institute of Technology;
2.
2. Polymer Division, Dalian Institute of Technology

Received Date: 6 October 1986
Available Online: 17 April 1987
Fund Project:

This paper reports the kinetic study of butadiene polymerization in toluene with n-butyl lithium and potassium butoxide as catalyst and with or without the addition of polar modifiers. It is found that,when K/Li=0,at 0℃, the reaction order of initiator concentration with respect to polymerization rate was 1; apparent rate constant k_ap of polymerization was independent of the initiator concentration. When K/Li=0.5 and 1.1, A/Li=0, k'=2/100, k_ap differed significantly, but the apparent energy of activation E_ap in both cases gave the same value:45.2kJ/mol. When K/Li<1.0, the polymerization rate increased with increase of K/Li; when K/Li>1.0, the polymerization rate became constant. Addition of polar modifiers greatly increased the rate of polymerization.
- Anion polymerization,
- Butadiene,
- Polymerization kinetics,
- Toluene,
- Lithium compound,
- Potassium compound
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