Vinyl Ether Cationic Polymerization

A photoinitiating system for controlled cationic polymerization of isopropyl vinyl ether ipve was developed using diaryliodonium salts as the photoinitiator.

Vinyl ether cationic polymerization.

Living cationic polymerization of isobutyl vinyl ether by hydrogen chloride lewis acid initiating systems in the presence of salts. Uv irradiation triggered the degradation of diphenyliodonium iodide which was followed by the controlled polymerization of ipve mediated by long lived propagating species. Herein the unique polymerization is reviewed along with the history of ring expansion polymerization. Isospecific polymerization and recognition of chiral side chains titanium complexes of α α α α tetraaryl 1 3 dioxolane 4 5 dimethanol taddol derived from naturally abundant tartaric acid were demonstrated to function as highly effective.

We have recently realized ring expansion cationic polymerization of vinyl ethers by using a hemiacetal ester embedded cyclic initiator that is easily synthesized. This article is part of the themed collection. In conjunction with snbr 4 polymerization of isobutyl vinyl ether ibve smoothly proceeded to give quantitative conversion. Macromolecules 26 1643 1649 1993.

Cationic polymerization of vinyl ethers controlled by visible light journal of the american chemical society photoinitiated cationic polymerizations are widely used in industrial processes. In this work we have developed a versatile and highly efficient initiation approach based on thienyl chloride derivatives with readily available starting materials for the living cationic polymerization of vinyl ethers. Poly vinyl ether s pves are useful materials of different applications. Stereoselective cationic polymerization of vinyl ethers by easily and finely tunable titanium complexes prepared from tartrate derived diols.

The living cationic polymerization of benzyl vinyl ether bnve was achieved by the ch 3 ch o i bu ococh 3 1 etalcl 2 initiating system in the presence of added bases. Living cationic copolymerization of amide functional vinyl ethers with isobutyl vinyl ether ibve was achieved using sncl 4 in the presence of ethyl acetate at 0 c. In situ direct nmr analysis of the growing species. However gaining photocontrol over chain growth would expand the utility of these methods and facilitate the design of novel complex architectures.