Biocompatible and Biodegradable Ultrafine Nanoparticles of Poly(Methyl Methacrylate-co-Methacrylic Acid) Prepared via Semicontinuous Heterophase Polymerization: Kinetics and Product Characterization

Figure 5

13C-NMR spectra of samples from the copolymerization of MMA/MAA (2/1, mol/mol) taken at global conversions of (a) 8.0 and (b) 89.7%. The segment of the spectrum of the sample at 89.7% in global conversion at which the syndiotacticity is evidenced is also included (c).