Vinyl Ether Cationic Polymerization

Herein the unique polymerization is reviewed along with the history of ring expansion polymerization.

Vinyl ether cationic polymerization. We have achieved ring expansion living cationic polymerization of vinyl ethers using designer cyclic initiator 1 that contained a hemiacetal ester. We have recently realized ring expansion cationic polymerization of vinyl ethers by using a hemiacetal ester embedded cyclic initiator that is easily synthesized. However gaining photocontrol over chain growth would expand the utility of these methods and facilitate the design of novel complex architectures. Living cationic polymerization of isobutyl vinyl ether by hydrogen chloride lewis acid initiating systems in the presence of salts.

Cationic polymerization of vinyl ethers controlled by visible light journal of the american chemical society photoinitiated cationic polymerizations are widely used in industrial processes. Macromolecules 26 1643 1649 1993. In conjunction with snbr 4 polymerization of isobutyl vinyl ether ibve smoothly proceeded to give quantitative conversion. A photoinitiating system for controlled cationic polymerization of isopropyl vinyl ether ipve was developed using diaryliodonium salts as the photoinitiator.

In situ direct nmr analysis of the growing species. 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. In the presence of 2 6 dimethylpyridine as an added base living cationic polymerization of isobutyl vinyl ether was achieved in n hexane at 0 to 40 c with the 1 isobutoxy ethyl acetate. 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.

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. The number average molecular weight of the obtained polymers increased in direct proportion to the monomer conversion with relatively low polydispersity and the amide functional monomer units were introduced almost quantitatively. Poly vinyl ether s pves are useful materials of different applications. This article is part of the themed collection.