Etude de la copolymerisation accepteur-donneur de quelques couples maleimides/ethers vinyliques

Abstract

Radical copolymerizations between N-substituted maleimides and vinyl ethers have been performed. Evidence of complex formation between N-methylmaleimide and 2-chloroethylvinylether has been obtained from 1H-NMR ( K = 0.081 · mol −1). We have made a kinetic study of radical copolymerizations between N-substituted maleimides ( R = —Me, — C 6H 5, —nBu) and vinyl ethers ( R′ =—OC 2H 4OC 6H 5, —OC 2H 4C 6F 13, —OC 4H 9, —OCH 2C 6H 5). These kinetic studies show that the succinidyl radical reacts more rapidly with the maleimide than with the vinyl ether. This differential reactivity was confirmed by telomerization with a thiol as telogen. These results exclude the formation of an alternating copolymer under our experimental conditions.