Binary polymerizations of AM-MADQUAT by inverse microemulsion copolymerization with low monomer concentration and using(NH4)2S2O8/NaHSO3 as redox were studied.Reactivity ratios of AM/MADQUAT in inverse microemulsion have been calculated by the methods of Kelen-Tüdos(K-T) and Yezrielev-Brokhina-Roskin(YBR)

being r1=0.63 and r2=1.12 respectively.Using the data of reactivity ratio

instantaneous composition

average composition

sequence distribution and average sequence length of the copolymers were calculated.The results indicate that the inverse microemulsion tends to random copolymerization

and that

at the early stage of the inverse microemulsion copolymerization

the instantaneous composition of the copolymers has a lower drift from average composition.