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PEG-PPG-PEG (Pluronic P123) symmetric triblock copolymer constitutes of poly(ethylene oxide)(PEO) and poly (propylene oxide) (PPO).
P 6699 (OTTO) Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol), average Mn ~5,800 Cas 9003-11-6 - used in the preparation and coating of Fe-W-C(O) nanoparticles by sol gel technique.