| Abstract: | 1-Acetoxybutadiene ( 1a, b ) can be polymerized under radical conditions as well in bulk, in benzene solution or in an aqueous emulsion. Polymers consist of ca. 80% 1, 4-units ( 4 ) and 20% 3,4-units ( 5 ), as determined by use of model compounds ( 2 and 3 ). Important chain transfer reactions to monomer, which have been measured, account for low number-average molecular weights (M?n ≈ 5000). Radical copolymerisations with acrylic, vinyl, and diene monomers indicate 1a, b to be quite similar to isoprene in these reactions. Copolymers with M?n ≈ 20 000 are readily obtained. 1-Acetoxybutadiene polymers prepared via cationic catalysts are unstable unless careful purified. Anionic reagents are destroyed by this monomer even at ?80°C. |
