FTIR analysis of the drug and the polymers. a Docetaxel trihydrate, b Pluronic® F127, c Pluronic® F68, d HPMC K4M, e docetaxel trihydrate: Pluronic® F127 (50:50), f docetaxel trihydrate: Pluronic® F68 (50:50), g docetaxel trihydrate: HPMC K4M (50:50), h docetaxel trihydrate: Pluronic® F127: Pluronic® F68: HPMC K4M (25:25:25:25)