Biodegradable pH-sensitive polyurethane micelles with different polyethylene glycol (PEG) locations for anti-cancer drug carrier applications

Biodegradable pH sensitive polyurethane micelles with a dense brush like coating of PEG were prepared. The PTX-loaded PEG-<italic>g</italic>-PU-3 micelles exhibited potent cytotoxicity against H460 cancer cells compared to PEG-<italic>b</italic>-PU-3 and PEG-<italic>c</italic>-PU-3 micelles.