Table 1.

Functional polyesters and their characterization data.

Functional Polyesters	Degree of Modification (%) 1	pKα 2	Transition pH 3
P(TPAE-alt-AD)	-	-	-
PE-Prop50	49	6.9	8.1
PE-Prop80	83	6.9	7.2
PE-Prop100	100	6.6	6.7
PE-Glyc50	46	6.4	6.9
PE-Glyc80	83	6.5	6.4
PE-Glyc100	100	5.8	5.6

¹ Determined by ¹H NMR spectroscopy. ² Determined by potentiometric titrations. ³ Determined by optical transmittance measurements.