Copolymerization of styrene with diketene

Synthesis of Poly(4-vinyl-1,4-butyrolactone-co-cyanoethylene)

“…The interest in the lactone function in the polymer chain originates from its ring-opening and ringclosing reactions. Some lactone-containing vinyl polymers such as poly(diketene-co-cyanoethylene)/ poly( diketene-co-chloroethylene ), 2 poly( diketeneco-styrene), 3 poly( 4-vinyl-1 ,4-butyrolactone-co-4(5)-vinylimidazole),4 and poly(3-vinyl-l ,4-butyrolactone-co-cyanoethylene),5 have already been investigated. The latter two copolymers have the lactone moieties in side chains.…”