Abstract
Polymers containing amino group were investigated to be used as biomaterials. Amination of polystyrene was carried out two steps ; nitration by nitric acid and acetic anhydride in carbon tetrachloride, and then reduction of nitro group with tin (II) chloride. The degree of nitro group introduced in polystyrene can be controlled by adjusting the amount of nitric acid. Then the solubility of these polymers in organic solvents was examined, and the processability of membrane prepared using the solution casting method was evaluated. The conditions of membrane preparation, e. g. the time of solvent evaporation, polymer concentration in the solution and the kind of coagulating solvents, affected to the physical structure of the membrane. Each membrane prepared was that of spongy structure entirely. Thus, these membranes are expected to be applied as biomaterials, e. g. antithrombogenic membrane by immobilization of heparin and membrane reactor with enzymes.
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