R. Shamsi - Research & Development Center, Marun Petrochemical Company, Mahshahr, Iran.
R. Sheibani - Research & Development Center, Marun Petrochemical Company, Mahshahr, Iran.

In this work, transitions in phase morphology of typical polypropylene / polycarbonate / poly[styrene-b-(ethylene-cobutylene)- b-styrene], PP/PC/(SEBS+SEBS-g-MA), blends with coreshell type morphology was investigated revisiting the critical role of viscosity ratio. The interdependence between morphological, thermal, thermo-mechanical, and mechanical properties was discussed based on experimental analyses as well as illustrative mechanistic description of morphology development and mode of fracture of blends containing high- (VH) and low-molecular-weight PC (VL) components. Dynamic mechanical analysis of samples with common (PC/SEBS) and inverse (SEBS/PC) core-shell particles showed different classes of blends; so that blends containing PC/SEBS had a higher storage and loss modulus, while blends containing SEBS/PC showed a lower β- transition temperature.

Core/shell Morphology; Viscosity ratio; Thermomechanical Behavior; Ternary Blends