The linear equation of controllable synthesis of poly (acrylamide-co-vinylamine)with low amino groups at low NaOH dosage was established. The influence factors

such as NaClO dosage

NaOH dosage

reaction time and temperature were investigated respectively. The results indicated that when the content of amino groups of poly(acrylamide-co-vinylamine)was below 50%

NaOH dosage was only as three times as that of polyacrylamide. The linear equation between NaClO dosage and content of amino groups of the product was also verified by elementary analysis. The results of GPC analysis showed that the average number molecular weight and PDI of the obtained poly(acrylamide-co-vinylamine)were approximate 1000—1800 and 1.6—2.0

respectively. This obtained linear equation would provide reaction conditions for the controllable synthesis of poly(acrylamide-co-vinylamine )with low amino groups.