Characterization of commercial polyvinylbutyral by gel permeation chromatography

Fractions of commercial polyvinylbutyral “Movital” were investigated by the “off-line” combination of gel permeation chromatography and viscometry. Parameters of the Mark–Houwink equation were determined for polyvinylbutyral in tetrahydrofuran at 25°C. Real values of the molecular parameters were obtained by the evaluation of chromatographic data using the principle of universal calibration.