P10 超音波支援による水―エタノール中の高分子重合挙動に及ぼす溶媒組成及び周波数の影響

抄録

Ultrasonically assisted polymerization of NIPAM (N-Isopropylacrylamide) in water and water-ethanol mixture was carried out in the ethanol concentration range of 0-80 v/v% at 20 kHz and 500 kHz, and the effects of solvent composition and frequency on polymer yield, weight average molecular weight (Mw), polydispersity(PD) were investigated. When ultrasonically assisted polymerization of NIPAM was performed in water-ethanol in the ethanol concentration range of 0-80 v/v% at 20 kHz and 14 W, the highest polymerization rate of NIPAM and the lowest PD were obtained for water-2.0 v/v% ethanol. For ultrasonically assisted polymerization of NIPAM in water-2.0 v/v% ethanol at 8.5 W, the polymerization rate of NIPAM at 20 kHz was higher than that at 500 kHz. To the contrary, for water-60 v/v% ethanol, the higher polymerization rate of NIPAM was obtained at 500 kHz compared to that at 20 kHz.