Talk:Living polymerization
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To my knowledge, Ziegler-Natta polymerization is not considered neither anionic nor living, and it was not Ziegler and Natta who first proposed and showed the existence of living polymerization. As far as I can remember, the first experiments on anionic living polymerization were polystyrene polymerizations.
- I have now fixed this, but the section needs to be expanded.
[edit] Selenide
The Selenium-Centered Radical-Mediated Polymerization section might be better incorporated in with the Iniferter section. As the conditions of control are under photoinitiation and not thermal conditions. However it does fall nicely in the list of organo chalcogenides, before Tellurium.
Al 07:04, 24 August 2006 (UTC)
The section on iodine transfer polymerization needs to be expanded. I'll do this in a few days.Delmlsfan 22:12, 24 November 2006 (UTC)
- Done. Delmlsfan 00:34, 1 December 2006 (UTC)
[edit] Living / "Living"
Living polymerization in the literature is often called "living" polymerization or controlled polymerization
is this a tautology? What does this line contribute to the article?
There was an upsurge in interest in living polymerisation in the ‘80s when radical chemistry was applied to the then established living polymerisation techniques involving, anionic, coordination or group transfer mechanisms. Living radical polymerisations (LRP) do not meet the requirements of the term “living” as defined by Szwarc. Since they involve radicals as intermediates they must involve a finite amount of termination. They were therefore considered less “alive” than that of the classical living polymerisation techniques and were therefore referred to as pseudo-/quasi-living, controlled rather than living or living was surrounded by quotations or placed in italics.
The term "living" and what it implies for polymerisation has still not really been resolved, regarding radical polymerization, thus they have placed quotations around the word to signify that the term isn't fully correct but that the effects observed are close enough to the desciption of the term "living".
If you have access to the literature a good discussion is found in the special issue in J. Polym. Sci., Part A: Polym. Chem. (Percec, V.; Tirrell, D. A. J. Polym. Sci., Part A: Polym. Chem. 2000, 38(10), Special Issue: Living or Controlled?). Also (Szwarc, M.; Levy, M.; Milkovich, R. M. J. Am. Chem. Soc. 1956, 78, 2656-2657. and Szwarc, M. Nature 1956, 178, 1168.)
Al 08:46, 30 May 2007 (UTC)
[edit] Split page?
There is a lot of detail on living free radical polymerization. Should it get its own page? Delmlsfan (talk) 01:46, 8 March 2008 (UTC)
