Abstract
Polyoxyalkylene block copolymers consisting of hydrophilic poly(ethylene oxide) (PEO) and hydrophobic poly(propylene oxide) (PPO) or poly(butylene oxide) (PBO) have not attracted much attention until recent years. Variations of the molecular characteristics (PPO/PEO ratio, molecular weight) of the copolymer during the synthesis allows the production of molecules with optimum properties that meet the specific requirements in different areas. Our present interest is focused, on the formation of the reversed polymeric micelles, which are formed in ‘oil’ phases with PEO–PPO–PEO-type as well as PPO–PEO–PPO-type triblock copolymers. A novel process of polymeric reversed micelle extraction is subsequently proposed based upon the concepts of reversed micelle extraction and polymeric micelle extraction. Extraction equilibrium partition of phenol between polymeric reversed micelle solutions was investigated to study the extraction behaviors. PPO content, copolymer and co-surfactant types affected the extraction process.
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