Effect of Lithium tert-Alkoxides on Anionic Polymerization of Butadiene Initiated with a Bifunctional Initiator

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Title:Effect of Lithium tert-Alkoxides on Anionic Polymerization of Butadiene Initiated with a Bifunctional Initiator
Creators:
Toman, Luděk
Vlček, Petr
Sufčák, Miloslav
Pleska, Alexander
Spěváček, Jiří
Holler, Petr
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 65, 3, pp. 352-360
Uncontrolled Keywords:Polymers, Anionic polymerization, Microstructure, Polybutadiene, <i>tert</i>-Alkoxides

Abstract

Polymerization of buta-1,3-diene initiated by bifunctional dilithium initiator in <i>tert</i>-butyl methyl ether, hexane and hexane-toluene mixtures was studied in the presence of Li <i>tert</i>-butoxide, 2-methylpentan-2-olate, 3-methylpentan-3-olate or 2,3-dimethylbutan-2-olate. The alkoxides lower the overall polymerization rate and affect, to a certain extent, microstructure of formed polymers. When applied in a concentration equal to that of the initiating centres, they lower the content of vinyl structures in polybutadiene by 10-12%. Increasing concentration of the alkoxide has no perceptible effect and, if used in 12-fold excess over the initiator, the content of 1,2-structures even increases. Polymers prepared in the presence of an alkoxide mostly have unimodal and narrow MWDs. <p>

Title:Effect of Lithium tert-Alkoxides on Anionic Polymerization of Butadiene Initiated with a Bifunctional Initiator
Creators:
Toman, Luděk
Vlček, Petr
Sufčák, Miloslav
Pleska, Alexander
Spěváček, Jiří
Holler, Petr
Uncontrolled Keywords:Polymers, Anionic polymerization, Microstructure, Polybutadiene, <i>tert</i>-Alkoxides
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:65
Number:3
Page Range:pp. 352-360
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20000352UNSPECIFIED
ID Code:1645
Item Type:Article
Deposited On:06 Feb 2009 17:11
Last Modified:06 Feb 2009 16:11

Citation

Toman, Luděk; Vlček, Petr; Sufčák, Miloslav; Pleska, Alexander; Spěváček, Jiří; Holler, Petr (2000) Effect of Lithium tert-Alkoxides on Anionic Polymerization of Butadiene Initiated with a Bifunctional Initiator. Collection of Czechoslovak Chemical Communications, 65 (3). pp. 352-360. ISSN 0010-0765

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