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(A) Mass loss and (B) molecular change of poly (1, 3-trimethylene carbonate) (PTMC) degraded in (PBS) and Lipase (3000 U/L) at 37 °C for different degradation time. (C) Surface morphology of poly (lactic-co-glycolic acid) (PLGA) and P50 (PTMC, Mn = 500,000) after being degraded in PBS or lipase for 12 weeks.
