Homopolymerizations and copolymerizations of N-phenylcitraconimide (I), N-benzylcitraconimide (II), N-n-hexylcitraconimide (III), N-n-butylcitraconimide (IV), and N-i-propylcitraconimide (V) were carried out at 60℃ by using azobisisobutyronitrile as an initiator in tetrahydrofuran. The conversion for homopolymerizations of N-substituted citraconimides at 60℃ for 3&acd