Vinyl Ether Polymerization

The alkene portion of the molecule is reactive in many ways.

Vinyl ether polymerization.

Provided is a method for the polymerization of vinyl ethers catalyzed by complexes of a lithium salt and a polyether. A preferred complex is a complex of lithium tetrafluoroborate and a glyme. Methyl vinyl ether can be made by reaction of acetylene and methanol in presence of a base. Amazing achievements in vinyl ether ve chemistry from the first example of ve polymerization to a plethora of recent research facilitated enormous progress in ves synthesis and in design of advanced polymer materials the fundamentally important point in this subject is the remarkable versatility of ve structures that resonates with the tunability of the.

Living cationic ring opening polymerization. Vinyl ethers ch 2 chor r methyl ethyl isobutyl benzyl are very reactive vinyl monomers. 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. The resulting polymers are produced under mild and controlled conditions and are useful in adhesives and coatings as well as in other uses such as for polymer electrolytes in batteries and for viscosity.

Polymerization is typically initiated with lewis acids such as boron trifluoride. Studied systems are based on i 2 hi and on zinc halides zinc chloride zinc bromide and zinc iodide. Macromolecules 2020 53 5 1536 1542. Polymer chemistry 10 1002 pola 23916 48 6 1449 1455 2010.

The resulting polymers exhibited precise chemical structures predetermined molecular weights and. 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. 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. A general and efficient access toward terminally functionalized poly vinyl ether s.

Poly vinyl ether s pves are useful materials of different applications. 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.