FIG. 4.
Molecular weight decreases of various biodegradable polymer films during immersion in phosphate buffer (pH 7.0) at 58°C. ■, PTMS; ▴, PTMC; ⧫, PEC (11.0 mol% carbonate); ●, PEC (17.1 mol% carbonate); ◊, PTMS/A; ○, PLA; □, PCL.
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