Vinyl Ether Radical Polymerization

Thienyl chloride initiated living cationic polymerization.

Vinyl ether radical polymerization.

Macromolecules 2020 53 5 1536 1542. Provided is a method for the polymerization of vinyl ethers catalyzed by complexes of a lithium salt and a polyether. 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. The photoinitiated cationic polymerization of vinyl ether ve monomers has been studied by real time infrared spectroscopy.

No anionic or radical polymerizations give high polymers from vinyl ethers except for the alternating radical copolymerization with an electron deficient monomer. This method however is highly sensitive to monomer structure and achieved only 76 m and 64 m in the case of n butyl bve and ethyl vinyl ether eve respectively. For the divinyl ether of triethylene glycol the chain reaction was shown to develop rapidly and extensively with kinetic chain lengths on the order of 10 000. Vinyl ethers 1 which have a strongly electron donating alkoxy substituent readily form polymers on treatment with an acidic compound initiator the polymerization is thus cationic in nature.

The product is used as low viscosity and fast curing monomers in cationic polymerization applications and as low viscosity monomers in radical polymerization applications. A new photoinitiating system for living cationic polymerization of vinyl ethers is reported. A preferred complex is a complex of lithium tetrafluoroborate and a glyme. A novel uv curing vinyl ether lcs with a wide temperature range was developed by mixturing various vinyl ether lc monomers.

In the current approach visible light irradiation of dimanganese decacarbonyl mn 2 co 10 in the presence of an alkyl bromide results in the formation of carbon centered radicals the photochemically generated radicals were then oxidized by diphenyliodonium ions to the corresponding cations. For example the state of the art method uses a phenoxide ligated titanium complex to achieve 92 meso diads m in the polymerization of iso butyl vinyl ether ibve. Copolymerization components include vinyl chloride vinyl acetate acrylic metacrylic acids and their ethers maleic anhydrides fluorinated olefin such as f2c cf2 and. A general and efficient access toward terminally functionalized poly vinyl ether s.