Encapsulation in polysulfone/polycarbonate/impact modifier blends

Ternary blends of polysulfone (PSF). polycarbonate (PC) Impact modifiers (I RI) were prepared to improve the mechanical properties of PSF PC binary ble nds. Two different core-shell impact modifiers, methyl methacrylate-butadie ne ethylacrylate (MBE) and acrylonitrile-butadiene-styrene (ABS) terpolymer s. were used, Morphology of the blends was very dependent on the matrix typ e but independent of the IM type, For PSF matrix PC tends to encapsulate th e IM. Whereas, for PC matrix, the IM tends to locate in PC matrix and thus two distinct phases of PSF and IM are observed. The encapsulation of PC ont o the IM in PSF matrix was verified from the model blends of PSF/ PC/SAN24 and PSF/PC/PMMA, where SAN24 and PMMA are corresponding to the shell of the IM, respectively. Impact strengths of the blends with the IM were slightly increased compared to PSF/C binary blends, but not significantly, This may be the result of poor PSF/PC interfaces, which art: valid from their immis cibility.