Abstract
Powdery polymers of vitamin A ester were synthesized by polymerizing acrylic and methacrylic ester of vitamin A under the presence of α, α'-azo-bis-isobutyronitrile as catalyst at 70℃ or of n-butyl lithium in hexane at -10〜-20℃. The polymer was not obtained when phenyl magnesium bromide was used as catalyst. Crotonic and undecylenic esters of vitamin A were not polymerized by the above methods. Powdery copolymers of vitamin A esters with acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, styrene or 2-vinyl-5-ethyl-pyridine were also synthesized by the same methods.
