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

Table 1

Results characterizing particle size, particle number, and polymerization rates along the copolymerization of MMA/MAA (2/1, mol/mol).

Polymerization time; (min)	(%)	(nm)	(nm)		(g/min-L of water)	× 10^−19; (1/L of water)	× 10^20; (g/min)
12	10.1	15.5	—	—	2.0	0.6	35.5
24	36.3	12.8	13.7	1.3	2.5	3.6	7.0
36	54.7	10.2	—	—	1.7	10.7	1.6
48	71.5	9.9	—	—	2.0	15.4	1.3
58.7	88.5	9.1	—	—	—	25.4	—
88.7	92.2	9.7	8.3	1.2	—	21.8	—

by QLS; by STEM.