Methyl Vinyl Ether Polymerization

Unprecedented controlled radical vinyl polymerization crp of vinyl ethers using reversible addition fragmentation chain transfer raft polymerization is reported.

Methyl vinyl ether polymerization.

Sequential block copolymerization of isobutylene ib with meve has also. Studied systems are based on i 2 hi and on zinc halides zinc chloride zinc bromide and zinc iodide. 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. Vinyl ethers ch 2 chor r methyl ethyl isobutyl benzyl are very reactive vinyl monomers.

Cationic polymerization of α methyl vinyl ethers was examined using an ibea et 1 5 alcl 1 5 sncl 4 initiating system in toluene in the presence of ethyl acetate at 0 78 c. Living cationic ring opening polymerization. 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 methyl ether is a colorless gas.

This mode of reactivity is analogous to the way vinyl acetate. It is soluble in water use. But the resulting polymers had low molecular weights at 0 or 50 c. Vinyl methyl ether is used in copolymers for coatings and lacquers in polystyrene and ionomer resins in plasticizers and in adhesives.

Methyl vinyl ether can be made by reaction of acetylene and methanol in presence of a base. The vinyl carbonate 13 152 gives only copolymerization the ketene acetal 11 153 and the methyl vinyl ether 14 152 give both copolymerization and chain transfer in styrene polymerization whereas with the benzyl vinyl ethers 12 153 15 8 and 16 18 151 chain transfer is the only reaction detected. This method however is highly sensitive to monomer structure and achieved only 76 m and 64 m in the case of n butyl bve. Workers that produce or use vinyl methyl ether may breathe in mists or have direct skin contact.

It is prone to polymerization leading to formation of polyvinyl ethers polymerization is typically initiated with lewis acids such as boron trifluoride.