Star Polymer-Drug Conjugates with pH-Controlled Drug Release and Carrier Degradation

Figure 3

Release of DOX from linear polymer conjugate P5 and star copolymer S4 incubated in phosphate buffer at 37°C. Linear polymer P5 at (▲) pH 5 and (Δ) pH 7.4. Star-like polymer S4 at (■) pH 5 and (○) pH 7.4.