سال انتشار: ۱۳۹۰
محل انتشار: کنفرانس بین المللی فرآورش پلیمرها
تعداد صفحات: ۴
Mahbobeh Aminjafari – Chemical Engineering Department, Isfahan University of technology, Isfahan, Iran
Mehdi Entezam – Iranian polymer and petrochemical institute, Tehran, Iran
Morteza Sadeghi – Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran.
Mohmood Masoumi – Chemical Engineering Department, Isfahan University of technology, Isfahan, Iran
Rheology and morphology of PA6/ABS immiscible blends were studied. The blends with different compositions were prepared using a twin screw extruder at temperature of 240℃ and with a screw rotation speed of 60 rpm. Dispersed phase domains size of the blends with dispersed-matrix morphology was predicted by Taylor model and it was in a good agreement with the results obtained from image analysis of the SEM micrographs. Also, a co-continuous morphology was observed for the blend with the same content (50 wt%) of the components. The linear viscoelastic behavior of the blends was analyzed using Palierne and Fractional Zener models. The Palierne model predicted well the rheological behavior of PA6-rich blends while it was incapable of predicting the rheological behavior of ABS-rich blends due to the their solid like rheological behavior. The experimental data of linear viscoelastic behavior of both PA6-rich and ABS-rich bends were satisfyingly fitted by Fractional Zener model (FZM). A large value of Ge, elastic modulus of the spring element of FZM, for ABS-rich blends was explained by solid like rheological behavior of these blends