Vinyl Ether Polymerization

Living cationic ring opening polymerization.

Vinyl ether polymerization.

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. Thienyl chloride initiated living cationic polymerization. Vinyl ethers ch 2 chor r methyl ethyl isobutyl benzyl are very reactive vinyl monomers. 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.

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. Polymerization is typically initiated with lewis acids such as boron trifluoride. 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.

It is prone to polymerization leading to formation of polyvinyl ethers. The alkene portion of the molecule is reactive in many ways. 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.

A general and efficient access toward terminally functionalized poly vinyl ether s. Shohei ida makoto ouchi mitsuo sawamoto living cationic polymerization of an azide containing vinyl ether toward addressable functionalization of polymers journal of polymer science part a. 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. Polymer chemistry 10 1002 pola 23916 48 6 1449 1455 2010.

The resulting polymers exhibited precise chemical structures predetermined molecular weights and. A preferred complex is a complex of lithium tetrafluoroborate and a glyme.