Polymerization Processes in Ionic Liquids. Cationic Polymerization of Styrene

There is an increasing interest in using ionic liquids as solvents for polymerization processes. Most published data deals with controlled radical polymerization. It has been shown that ionic liquids offer several advantages for conducting Atom Transfer Radical Polymerization (ATRP), such as good so...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecular symposia 2006-07, Vol.240 (1), p.107-113
Main Authors: Baśko, Małgorzata, Biedroń, Tadeusz, Kubisa, Przemysław
Format: Article
Language:English
Subjects:
Applied sciences
Cationic polymerization
Conducting polymers
Exact sciences and technology
Ionic liquids
Organic polymers
Physicochemistry of polymers
Polymerization
polystyrene
Preparation, kinetics, thermodynamics, mechanism and catalysts
Racemization
Radicals
Solvents
Styrenes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:There is an increasing interest in using ionic liquids as solvents for polymerization processes. Most published data deals with controlled radical polymerization. It has been shown that ionic liquids offer several advantages for conducting Atom Transfer Radical Polymerization (ATRP), such as good solubility of catalyst and improved kp/kt ratio. Ionic liquids are highly polar therefore they seem to be suitable solvents for conducting also ionic polymerization processes. In our preliminary communication we reported on cationic polymerization of styrene initiated by R‐Cl/TiCl4 system in ionic liquid. To clarify the mechanism of this process, racemization of optically active 1‐phenylethyl choride (initiator and the model of dormant species) was studied and it was shown that in ionic liquid racemization proceeds even in the absence of coinitiator (TiCl4). Because racemization proceeds through ionization of CCl bond, this explains the cationic polymerization of styrene initiated by R‐Cl alone (in the absence of coinitiator). Chain transfer, however, cannot be eliminated, therefore polymerization is not controlled.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.200650814