Vinyl Ethers Polymerization

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 catalysts for the stereoselective cationic polymerization of vinyl ethers ves.

Vinyl ethers polymerization.

Vinyl ethers undergo radical initiated copolymerization in the presence of specific monomers such as maleates fumarates and acrylics. Cationic polymerization and insertion chemistry in the reactions of vinyl ethers with α diimine pdme species. Chinese journal of polymer science 2019 37 9 851 857. Poly vinyl ether s pves feature a polar ether functionality in.

Vinyl ethers undergo homopolymerization via a cationic mechanism. Free radical copolymerization of vinyl ethers is also possible. Poly vinyl ether s with a t g as high as 100 c have been obtained in the living cationic polymerization of vinyl ethers with a bulky tricyclodecane or tricyclodecene unit using hcl zncl 2 in toluene at 30 c. Isotactic poly isobutyl ve m 90 was generated via polymerization using an initiating system prepared by simply mixing taddol ticl 4 and isobutyl ve monomer.

Journal of the american chemical society 2010 132 14 5273 5284. It can be initiated with peroxide azo and redox initiators. Living cationic polymerization tfa et 2 alcl 1 4 dioxane of the vinyl ether functionalities afforded linear poly ve s which were then subjected to polymerization involving the acetylene moieties by either cu catalyzed oxidative coupling or a rh catalyzed process with both catalytic systems promoting formation of brush shaped polymers. They are increasingly used in radiation curing systems because of a lower toxicity profile than the commonly used acrylic monomers.

A user friendly living cationic polymerization. We identified the cationic polymerization of vinyl ethers as a high value target to exemplify such a catalyst controlled approach. Coordination polymerization of polar vinyl monomers by single site metal catalysts. 124 the fast living cationic polymerization of vinyl ethers with sncl 4 combined with etalcl 2 in the presence of an ester as an added base was reported.

However the polymerization under free radical conditions gives only low molecular weight oligomers and only copolymers can be synthesized.