Study on synthesis and property of terpolymer sulfonated polyacrylamide used in EOR
The sulfonated polyacrylamide( SPAM) is synthesized from acrylamide( AM),2-acrylamide-2-methyl propane sulfonic( AMPS) and sodium styrene sulfonate( SSS) by a new co-initiator system which is composed of redox initiator and water-soluble azo initiator. The results show that the optimal synthesis conditions of AM /AMPS /SSS are as follows: monomers mass concentration is 10%,SSS amount is 0. 5%,initiator mass concentration is 0. 06%,mass ratio of redox to AIBA initiators is 1 ∶4,pH = 9,reaction temperature is 5 ℃. Under this condition,the molecular weight of SPAM is 7. 36 million. It has much better high temperature resistance and salt resistance than industrial partially hydrolyzed polyacrylamide.