An ultrasonically initiated, free radical catalyzed polymerization process was developed where variable amounts of initiator, the acoustic intensity and the reaction time were evaluated. The potential for this new process is enormous. 1-Dodecanethiol is a special initiator for the ultrasonic system. The argon gas bubbling is important in the ultrasonic polymerization. With ultrasonic polymerization, we can get a molecular weight of 85,000 for poly(acrylamide). For the ultrasonic polymerization of acrylamide, when the amount of the initiator decreases, the molecular weight increases and the conversion decreases. As the power intensity increases, the conversion increases.