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The compressive modulus changes of copolymer 1 (PPF530-co-PCL530R0.3) (□), copolymer 2 (PPF530-co-PCL530R0.5) (Δ) and copolymer 3 (PPF530-co-PCL530R0.75) (◇) over time. The p values between groups by different variables (Time and PCL ratio) both were less than 0.01.
