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

<table>FT-IR spectra of PECA and P(ECA-IA-MEG) hydrogels.</table>

BioMed Research International

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Figure 4

Figure 4: Synthesis, Characterization, and Acute Oral Toxicity Evaluation of pH-Sensitive Hydrogel Based on MPEG, Poly(<i>ε</i>-caprolactone), and Itaconic Acid 

Figure 4 | Synthesis, Characterization, and Acute Oral Toxicity Evaluation of pH-Sensitive Hydrogel Based on MPEG, Poly(ε-caprolactone), and Itaconic Acid 