Effect of the Reaction Temperature on the Polymerization of 2-Ethylhexyl Acrylate Initiated by Lithium Ester Enolate-Lithium tert-Butoxide Complex

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Title:Effect of the Reaction Temperature on the Polymerization of 2-Ethylhexyl Acrylate Initiated by Lithium Ester Enolate-Lithium tert-Butoxide Complex
Creators:
Vlček, Petr
Jakeš, Jaromír
Otoupalová, Jaroslava
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 58, 11, pp. 2565-2573

Abstract

The effect of reaction temperature in the range from -72 to 0 °C on the course of the anionic polymerization of 2-ethyhexyl acrylate in 9 : 1 (v/v) toluene THF was studied. In the polymerization <i>tert</i>-butyl 2-lithioisobutyrate and Li <i>tert</i>-butoxide were used as initiator and active centre stabilizer, respectively; the alkoxide at two different concentrations. From conversion curves and number-average molecular weights of the polymers, the rate constants of the propagation and autotermination reactions were calculated. The rate constant of autotautomerization rises more rapidly with temperature than that of propagation. Consequently, at temperatures higher than -60 °C polymerization autoterminates before reaching quantitative monomer conversion. The limiting monomer conversion was higher at the higher alkoxide concentration but did not reach 100%.

Title:Effect of the Reaction Temperature on the Polymerization of 2-Ethylhexyl Acrylate Initiated by Lithium Ester Enolate-Lithium tert-Butoxide Complex
Creators:
Vlček, Petr
Jakeš, Jaromír
Otoupalová, Jaroslava
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:58
Number:11
Page Range:pp. 2565-2573
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19932565UNSPECIFIED
ID Code:372
Item Type:Article
Deposited On:06 Feb 2009 17:00
Last Modified:06 Feb 2009 16:00

Citation

Vlček, Petr; Jakeš, Jaromír; Otoupalová, Jaroslava (1993) Effect of the Reaction Temperature on the Polymerization of 2-Ethylhexyl Acrylate Initiated by Lithium Ester Enolate-Lithium tert-Butoxide Complex. Collection of Czechoslovak Chemical Communications, 58 (11). pp. 2565-2573. ISSN 0010-0765

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