Synthesis, Characterization, and Acute Oral Toxicity Evaluation of pH-Sensitive Hydrogel Based on MPEG, Poly(<i>ε</i>-caprolactone), and Itaconic Acid

<table>SEM observation of P(ECA-IA-MEG) in pH 1.2 (a) and pH 6.8 (b).</table>

BioMed Research International

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Figure 5

Figure 5: Synthesis, Characterization, and Acute Oral Toxicity Evaluation of pH-Sensitive Hydrogel Based on MPEG, Poly(<i>ε</i>-caprolactone), and Itaconic Acid 

Figure 5 | Synthesis, Characterization, and Acute Oral Toxicity Evaluation of pH-Sensitive Hydrogel Based on MPEG, Poly(ε-caprolactone), and Itaconic Acid 