Rapid and efficient gas chromatographic method for measuring the kinetics of lipase-catalyzed transesterification of phosphatidylcholine

2011 ◽  
Vol 69 (3-4) ◽  
pp. 103-106 ◽  
Author(s):  
Junmin Du ◽  
Xianglin Hou ◽  
Dong Wu ◽  
Cuiping Feng
Keyword(s):  
Chromatographic Method ◽  
Gas Chromatographic Method ◽  
Kinetics Of

The mechanism of the anionic coordination polymerization of isoprene

1980 ◽  
Vol 45 (9) ◽  
pp. 2391-2399 ◽  
Author(s):  
Miroslav Kašpar ◽  
Jiří Trekoval
Keyword(s):  
Chromatographic Method ◽  
Initial Period ◽  
Reaction Scheme ◽  
Polymerization Kinetics ◽  
Coordination Polymerization ◽  
Initial Concentration ◽  
The Cross ◽  
Gas Chromatographic Method ◽  
Kinetics Of

The polymerization kinetics of isoprene (2-methyl-1,3-butadiene) in benzene with butyllithium as the initiator was investigated by the gas chromatographic method. After completion of the initial period of the reaction, its order with respect to the initial concentration of initiator is negative at the concentrations of the latter between 0.01 and 0.25 mol/l, and positive at higher concentrations. A reaction scheme has been suggested with respect to the "cross" association of butyllithium and of the "living" oligoisoprene.

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