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Poly(ethylene glycol)- block-poly( γ-benzyl l-glutamate)- graft-poly(ethylene glycol) (PEG- b-PBLG- g-PEG) copolymer was synthesised by the ester exchange reaction of PEG- block-PBLG copolymer with mPEG. The self-association behaviour of PEG- b-PBLG- g-PEG in mixtures of ethanol, chloroform, and trifluoroacetic acid as denaturing acid was investigated by transmission electron microscopy, nuclear magnetic resonance spectroscopy, FT-IR spectroscopy, dynamic light scattering, and viscometry. It was revealed that the increase in denaturing acid content in the mixed system not only promoted the critical micelle concentration but also changed the morphology of the polymeric micelles from elliptical to spherical. [ABSTRACT FROM AUTHOR]

series of poly( γ-benzyl l-glutamate) (PBLG)/polyurethane (PU) containing carboxyl group blend membranes was prepared by casting the polymer blend solution in dimethylformamide (DMF). The surface morphology of the PBLG/PU blend membranes was investigated by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of PBLG/PU blend membranes were studied by differential scanning calorimetry (DSC), tensile tests and other physical methods. It was revealed that the introduction of PU could exert outstanding effects on the morphology and the properties of PBLG membrane. [ABSTRACT FROM AUTHOR]

series of poly(vinyl alcohol) (PVA)/poly( γ-benzyl l-glutamate)- block-poly(ethylene glycol) (PBLG- b-PEG) blend membranes with different PVA/PBLG- b-PEG mole ratios were prepared by pervaporation. Structure and morphologies of PVA/PBLG- b-PEG blend membranes were investigated using Fourier transformation infrared spectroscopy (FTIR), and atomic force microscopy (AFM). Mechanical and chemical properties of PVA/PBLG- b-PEG blend membrane were studied by tensile testing and other physical methods. It was revealed that the introduction of PBLG- b-PEG copolymer has significant effect on the properties of a PVA membrane. [ABSTRACT FROM AUTHOR]

Poly( γ-benzyl l-glutamate)- graft-poly(ethylene glycol) (PBLG- graft-PEG) copolymer was synthesized by the ester exchange reaction of PBLG homopolymer with mPEG. Aggregation behavior of the PBLG- graft-PEG copolymer in mixtures of ethanol and chloroform was investigated by transmission electron microscopy (TEM), dynamic light scattering (DLS), and viscometry. Effects of the polymer solution concentration, grafting degree, test temperature, and chloroform content on the morphology, average particle diameter, and critical micelle concentration (CMC) of the micelles formed by the PBLG- graft-PEG copolymer in the mixed solvents were mainly studied. It was revealed that the PBLG- graft-PEG copolymer can self-assemble into polymeric micelles with a core-shell structure in various shapes depending on the preparation conditions. [ABSTRACT FROM AUTHOR]