Vinyl Ether Polymerization

Provided is a method for the polymerization of vinyl ethers catalyzed by complexes of a lithium salt and a polyether.

Vinyl ether polymerization.

In the presence of diaryliodonium or triarylsulfonium photoinitiators the cationic polymerization occurs rapidly upon uv exposure and continues to proceed upon storage in the dark. 1 the first systematic investigations of vinyl ether polymerization began in 1928 at i g. In order to overcome the challenge of direct radical polymerization of vinyl ethers commercial hydroxy functional vinyl ethers such as 2 hydroxyethyl vinyl ether heve were subjected to free radical polymerization generating vinyl polymers without polyacetals obtained by self polyaddition polymerization. A combination of a metal free photocatalyst a chain transfer agent and light irradiation enables the synthesis of various poly vinyl ether s with good control over molecular weight and dispersity as well as excellent chain end fidelity.

This polymerization proceeds under mild conditions. It was in 1878 that wislicenus reported the transformation of ethyl vinyl ether into a viscous material in the presence of iodine. The photoinitiated polymerization of vinyl ether ve based coatings has been studied by real time infrared rtir spectroscopy. Herein the unique polymerization is reviewed along with the history of ring expansion polymerization.

A preferred complex is a complex of lithium tetrafluoroborate and a glyme. This article is part of the themed collection. 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.

Vinyl ethers undergo homopolymerization via a cationic mechanism. Stereoselective cationic polymerization of vinyl ethers by easily and finely tunable titanium complexes prepared from tartrate derived diols. Teator and leibfarth report a general protocol to polymerize a variety of such vinyl ethers isotactically see the perspective by foster and o reilly. Vinyl ethers undergo radical initiated copolymerization in the presence of specific monomers such as maleates fumarates and acrylics.