Assessing the Influence of <scp>ABS</scp> ‐Grafted Maleic Anhydride on the Rheological, Thermal, Mechanical, and Morphological Properties of Polycarbonate/Acrylonitrile‐Butadiene‐Styrene Blends

ABSTRACT Despite numerous studies on polycarbonate (PC)/acrylonitrile‐butadiene‐styrene (ABS) blends, the full impact of ABS‐grafted maleic anhydride (ABS‐g‐MA) as a compatibilizer over a broad range of blend ratios has not been thoroughly investigated. This research provides a comprehensive assessment of how ABS‐g‐MA influences the rheological, mechanical, thermal, and morphological properties of PC/ABS blends with varying compositions. Melt flow index (MFI) measurements indicate a decrease as PC content increases, due to its inherently higher viscosity, with a further reduction following ABS‐g‐MA addition, suggesting enhanced interfacial interactions and molecular entanglement. Rheological data reveal notable increases in solid‐like behavior and viscosity with higher compatibilizer content, indicating improved phase connectivity. These rheological enhancements correspond to a significant rise in impact strength, particularly at a 1:1 PC/ABS weight ratio, attributed to stronger interfacial adhesion and more efficient stress transfer. Scanning electron microscopy (SEM) images confirm finer phase dispersion and reinforced interfaces in the compatibilized blends. By integrating these multi‐scale observations, this study reveals the compatibilization mechanism of ABS‐g‐MA, providing valuable guidance for optimizing PC/ABS blend performance in advanced applications.