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To manipulate the degradation of polymeric biomaterial for potential applications in tissue regeneration, a series of piperazine‐based polyurethane ureas (P‐PUUs) were designed and prepared with poly(d,l‐lactic acid) diol (PDLLA diol), 1,6‐hexamethylene diisocyanate (HDI), and piperazine (PP). The number of piperazine units [Num(pp)] in the P‐PUUs could be precisely calculated by a specified equation...
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