Effect of Ultrasonic Irradiation on Ceric-Salt-Initiated Grafting of Methyl Methacrylate onto Regenerated Cellulose Film

摘要

Effect of ultrasonic irradiation on ceric salt (Ce~4+)-initiated grafting of methyl methacrylate (MMA) on regenerated cellulose film (thickness =20 #mu#m) was investigated under an air atmosphere in water solvent at 60degC.The grafting system with the ultrasonic irradiation was characterized by higher percentage of grafting and graft efficiency than the system without the irradiation.Reaction of cellulose with Ce~4+ was also accelerated by the ultrasonic irradiation.No accelerating effect of grafting due to the ultrasonic irradiation was observed for the system under reduced pressure of 5 torr.The effect of the ultrasonic irradiation on the average molecular weight of MMA-grafted chains was also studied.Moreover,the surface layer of the resulting grafted films was examined by attenuated total reflection-infrared (ATR-IR) measurement and scanning electron microscopy (SEM) observation.