Browsing by Author "He, Yanpu"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Critical Overlap Concentration of Poly(n-butyl methacrylate) in Ionic Liquid and Methylcellulose in Water(2014-04-16) He, YanpuIn this study, intrinsic viscosity measurements were applied to determine critical overlap concentration c* for two systems with lower critical solution temperature (LCST) phase behavior: poly(n-butymethacrylate) (PnBMA) in ionic liquid bis(trifluoromethylsulfonyl)imide ([BMIm][TFSI]), and methylcellulose in water. The c* of both polymers was found to exhibit strong dependence on molecular weight and temperature.Item Intrinsic Viscosity of Methylcellulose Aqueous Solutions(2015-04-22) He, YanpuIn this study, the intrinsic viscosity of methylcellulose (MC) aqueous solutions was measured using a water-bathed Cannon-Fenske Routine Viscometer and was found to exhibit strong dependence on molecular weight, temperature, and time of annealing. In particular, the intrinsic viscosity increased with increasing molecular weight and lowered temperature. Furthermore, the intrinsic viscosity of a MC solution were observed to increase with time of annealing at near-theta temperatures, which implies the formation of aggregates.Item Intrinsic Viscosity of Methylcellulose Aqueous Solutions(2015-04-22) He, Yanpu