Simulation of Orientation Distribution Function in Strip-Biaxial Stretching of Syndiotactic Polypropylene Film Calculated with the Plastic Slip Model

We have estimated the orientation distribution function of each plane for strip-biaxial stretching in syndiotactic polypropylene films. The pole figure device familiar in X-ray diffraction was used. These distribution functions were compared with that of a simulation of orientation in crystallites after strip-biaxial stretching, by assuming polycrystalline aggregations. We have evaluated the Rfactor calculated from observed and simulated distribution function of streched specimens. We analyzed the mechanism of orientation for the strip-biaxial stretching process in which the {110}, and (100), slip systems dominated in five types of slip systems by applying the principle of maximum plastic work.