scholarly journals Ampholytic Terpolymers of Acrylamide with Sodium Acrylate and (2-Methacryloyloxyethyl)trimethylammonium Chloride. Synthesis with 60Co γ-Ray and Polymerization Kinetics

1999 ◽  
Vol 31 (12) ◽  
pp. 1243-1246 ◽  
Author(s):  
Xuewu Ge ◽  
Minya Sheng ◽  
Qiang Ye ◽  
Xiangling Xu ◽  
Zhicheng Zhang
Keyword(s):  
Polymerization Kinetics ◽  
Sodium Acrylate ◽  
Trimethylammonium Chloride ◽  
Γ Ray

Nuclear γ ray lines in the supernova SN 1987a

1991 ◽  
Vol 16 (4) ◽  
pp. 443-457
Author(s):  
R. Lehoucq ◽  
Ph. Durouchouxa
Keyword(s):  
Sn 1987A ◽  
Γ Ray

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.

The effect of electrondonors on the polymerization kinetics of isoprene

1980 ◽  
Vol 45 (12) ◽  
pp. 3338-3346
Author(s):  
Miroslav Kašpar ◽  
Jiří Trekoval
Keyword(s):  
Induction Period ◽  
Ethyl Ether ◽  
Reaction Order ◽  
Propagation Rate ◽  
Reaction Scheme ◽  
Polymerization Kinetics ◽  
Polymerization Rate ◽  
Constant Concentration ◽  
Initial Concentration ◽  
Kinetics Of

The effect of small additions of 1-octene, butyl ethyl ether and triethylamine on the polymerization kinetics of isoprene (2-methyl-1,3-butadiene) in benzene initiated with butyllithium was investigated by employing the GLC analysis. The addition of 1-octane was reflected only in a shorter induction period of the reaction; the effect on the propagation rate was insignificant. With the increasing amount of butyl ethyl ether, the polymerization rate increases linearly, while the reaction order with respect to the concentration of triethylamine is variable and increases from 0.33 to 0.66 with the increasing concentration of the initiator. For a constant concentration of triethylamine, the reaction order with respect to the initial concentration of the initiator was found to vary considerably, reaching even negative values. A reaction scheme was suggested, taking into account the competition between two different solvates of alkyllithium.

scholarly journals Total absorption γ -ray spectroscopy of niobium isomers

2019 ◽  
Vol 100 (2) ◽  
Author(s):  
V. Guadilla ◽  
A. Algora ◽  
J. L. Tain ◽  
J. Agramunt ◽  
J. Äystö ◽  
...  
Keyword(s):  
Total Absorption ◽  
Γ Ray
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