Abstract
In this work, we synthesized several MDI-based poly(carbonate)urethanes (PCU) by using four different soft segments, including two aliphatic macrodiols (poly(hexyl, ethyl)carbonate diols, MW 2017 and 865, respectively) and two aromatic macrodiols (MW ∼ 2000 and 1000, respectively), in different molar ratios to MDI. We demonstrate that these polymers exhibited various degree of micro-phase separation that further influenced their surface protein adsorption, platelet activation as well as cellular attachment and growth. Polyurethanes based on poly(hexyl, ethyl)carbonate diol with MW 2017 in a molar ratio MDI/macrodiol/chain extender of either 3/2/1 or 4/3/1 resulted in greater micro-phase separation as well as superior biocompatibility and biostability.
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