MuCell^® technology for injection molding: A processing method for polyether-urethane scaffolds

MuCell^® injection molding technology which takes supercritical carbon dioxide as blowing agent was used as processing method to generate porous samples made of thermoplastic polyether-urethane. The influence of processing parameters on the morphology of the porous structures was examined by mercury intrusion porometry and image analysis. An increase in injection speed and content of CO₂ in the polymer melt decreased pore sizes whereas an increase in the percentage of weight reduction increased pore sizes. Polyether-urethane samples with porosities of 70% and pore sizes from 184 to 1102 μm were observed. Interconnective pore sizes ranged from 40 to 275 μm.