Specific salt effect of lithium perchlorate in living anionic polymerization of methyl methacrylate and tert-butyl acrylate

Baskaran, D. ; Sivaram, S. (1997) Specific salt effect of lithium perchlorate in living anionic polymerization of methyl methacrylate and tert-butyl acrylate Macromolecules, 30 (6). pp. 1550-1555. ISSN 0024-9297

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ma961118w

Related URL: http://dx.doi.org/10.1021/ma961118w

Abstract

Living anionic polymerization of methyl methacrylate can be achieved at -40 °C in tetrahydrofuran (THF) and at -78°C in toluene/THF (9/1 v/v) using (1,1-diphenylhexyl)lithium as the initiator in the presence of lithium perchlorate (LiClO4) as the additive. Polymerization of tert-butyl acrylate also proceeds in a living manner at -78°C in THF. Polymers with narrow molecular weight distributions and high initiator efficiencies can be obtained. The use of lithium perchlorate retards the rate of polymerization. The ratio of LiClO4 to initiator has a greater influence in determining the control of polymerization. The beneficial effect of lithium perchlorate is attributed to its efficient interaction with growing ester-enolate ion pairs.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:48480
Deposited On:14 Jul 2011 10:18
Last Modified:14 Jul 2011 10:18

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