| abstract |
The present invention provides a production method capable of easily controlling the molecular weight, wherein a copolymer having an arbitrary composition can be obtained from a copolymer of vinyl ester and vinyl ether. A vinyl ester monomer and a vinyl ether monomer are represented by the following formula (1). Or / and the following formula (2) (In Formula (1), R 1 is an aliphatic hydrocarbon group having 1 to 12 carbon atoms which may have a substituent, and R 2 and R 3 are aliphatic hydrocarbons having 1 to 12 carbon atoms. Copolymerization is carried out in the presence of a compound of a group, Z represents an oxygen atom or a sulfur atom), a radical polymerization initiator, and a Lewis acid. [Selection figure] None |