Effect of electrolytes and surfactants on the thermoseparation of an ethylene oxide-propylene oxide random copolymer in aqueous solution.
The thermnoseparation of aqueous solutions of Breox 50 A 1000, an ethylene oxide-propylene oxide 50:50 (w/w) random copolymer, was studied. The cloud-point diagram for Breox in water solution and the effects of electrolytes and surfactants on the cloud-point temperature (CPT) were determined. The Breox concentration in both phases after the thermoseparation was followed with a reversed-phase HPLC method. The effects of separation temperature and additives on phase composition were evaluated.
Cunha
M T
MT
Centro de Engenharia Biológica e Química, Instituto Superior Técnico, Lisboa, Portugal.
Tjerneld
F
F
Cabral
J M
JM
Aires-Barros
M R
MR
D002845:Chromatography / Q000379:methods*; D002851:Chromatography, High Pressure Liquid; D004573:Electrolytes; D011095:Polyethylenes; D011108:Polymers; D011126:Polypropylenes; D012996:Solutions; D013501:Surface-Active Agents; D013696:Temperature; D014867:Water
D004573:Electrolytes; D011095:Polyethylenes; D011108:Polymers; D011126:Polypropylenes; D012996:Solutions; D013501:Surface-Active Agents; D014867:Water; C078661:UCON 50-HB-5100