Modification of Hydrophobic Polypeptide-based Film by Blending with Hydrophilic Poly(acrylic acid)

In this study, a series of poly(γ-benzyl L-glutamate)/poly(acrylic acid) (PBLG/PAA) polymer blend films were preparedby casting the polymer blend solution in dimethylsulfoxide (DMSO). The structure and morphology of the polymer blend film wereinvestigated by Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). Thermal, mechanical, andchemical properties of PBLG/PAA polymer blend films were studied by Differential Scanning Calorimetry (DSC), Thermogravimetric(TG) Analysis, Tensile Tests, and measurements of Surface Contact Angles. The results revealed that the introduction of PAA could exertgreat effects on the structure and properties of the polypeptide films.