Figure 1.
Preparation of p(AAPBA-co-NVCL) and porous PLGA microspheres. (A) The synthesis process for p(AAPBA-co-NVCL); (B) A schematic representation of the preparation of porous PLGA microspheres; (C) 1H-NMR spectra of (a) NVCL, (b) AAPBA and (c) p(AAPBA-b-NVCL); (D) SEM images of exemplar insulin-loaded PLGA particles ((a) ×1500; (b) ×10,000)