anionic polymerization

anionic polymerization

[¦a‚nī¦än·ik pə‚lim·ə·rə′zā·shən]
(organic chemistry)
A type of polymerization in which Lewis bases, such as alkali metals and metallic alkyls, act as catalysts.
References in periodicals archive ?
[20], the anionic polymerization of cyclosiloxane is initiated by the free anions.
(2) Plenary Lecture: Synthesis of in-chain and chain-end functionalized polymers using alkylithium-initiated anionic polymerization. Rod Quirk, University of Akron.
The rapid anionic polymerization of lactams has received considerable attention since its discovery in the 1950s (1-27).
The aim of this study is to analyze the efficiency of DMAP as initiator of the anionic polymerization of epoxy monomers.
He is co-author of the standard textbook, Anionic Polymerization Principles and Practical Applications, and is co-editor of the standard textbook, Thermoplastic Elastomers.
The first reported research on monomer polymerization in an extruder was on the anionic polymerization of caprolactam to nylon-6 (16).
The technical session on "Performance polymers," moderated by David Frantz of Goodyear Tire & Rubber, will include a keynote address by Ben Kastein on "75 years of the Akron Rubber Group." Technical presentations will include the following: "`Liquid crystals and polymers: A match made in heaven," John West, Kent State University; "Therban hydrogenated nitrile butadiene rubber: Past, present and future," Sharon Guo and John Dato, Bayer; "New thermoplastic elastomers by anionic polymerization," Roderic Quirk, University of Akron; and "New highly crosslinked TPEs based on VNB-EPDM," Maria Ellul, Advanced Elastomer Systems.
Anionic polymerization of lactams is typically initiated by a two-component catalyst/activator system, composed of lactamate anions or their precursors, and N-acyllactam (NAL) or similar activating compounds.
These values are on the order of magnitude reported for the polymerization of ethyl cyanoacrylate by anionic polymerization in aqueous dispersions stabilized with surfactants [21-23].
Among the topics are fluorinated peroxides as initiators of fluorinated polymers, anionic polymerization fluorinated vinyl monomers, synthesizing fluoro-functional conjugated polymers by electrochemical methods, structure-property relations in semi-fluorinated polymethacrylates, and the melt viscosity properties of fluoroplastics: correlations to molecular structure and tailoring principles.