Phase separation in aqueous mixtures of hydrophobically modified cellulose derivatives with their nonmodified analogues

摘要: Mixtures of hydrophobically graft-modified cellulose derivatives and their nonmodified analogues have been studied in aqueous solution. A qualitatively similar behavior was found the phase nonionic as well cationic polymer systems. Over a large range total concentrations mixture ratios solutions separated into two phases concentration, with one enriched modified polymer. From manufacturing process investigated are likely to contain chains rather continuous distribution degrees substitution and, possibly, patterns. This causes complex that cannot be adequately described by ternary representation. The multicomponent nature became apparent from composition analyses equilibrium. It may thus more appropriate view separation fractionation. small relative volume highly enhanced hydrophobe content (compared original sample) created. particularly obvious dilute solutions. Sometimes difficult observe because equilibrium had therefore, refractive indices. observations presented here call for attention producers users these types polymers.