The effect of melt viscosity of poly(acrylonitrile-butadiene-styrene) (ABS) and the compatibilization with poly(methyl methacrylate) (PMMA) on the mechanical properties of ABS/polycarbonate (PC) blends at ABS-rich compositions were studied. Vicat softening temperature (VST) and impact strength were increased with the content of PC. This trend became more evident as the viscosity of ABS was close to that of PC. The compatibilizing effect of PMMA could be ascertained from the enhanced properties of VST, tensile strength, flexural strength, and the morphology observed by scanning electron microscope. The improved adhesion at the ABS/PC interface by the PMMA reduced the notch sensitivity of the blends. The 1/8" notched Izod impact strength of compatibilized blends was lower than that of uncompatibilized blends, whereas 1/4" notched Izod impact strength was higher.

Poly(acrylonitrile-butadiene-styrene) (ABS)의 함량이 polycarbonate (PC)보다 많은 ABS/PC 블렌드에서 ABS의 용융점도, poly(methyl methacrylate) (PMMA)의 상용화 효과가 블렌드의 물성에 미치는 영향을 조사하였다. PC의 함량이 증가함에 따라 Vicat softening temperature (VST), 내충격강도 등 물성이 향상되었으며, 그 향상 정도는 ABS의 용융점도가 증가하여 PC의 용융점도에 근접할수록 크게 나타났다. PMMA의 상용화 효과는 VST, 인장강도, 굴곡 강도의 향상과 모폴로지 등으로부터 관찰할 수 있었다. PMMA의 첨가에 의한 계면접착정도의 증가는 블렌드의 notch sensitivity를 감소시켰다. 1/4" notch 충격강도는 PMMA가 첨가된 경우, 1/8" notched 충격강도는 PMMA가 첨가되지 않은 경우 크게 나타났다.

Keywords: ABS; polycarbonate; compatibilizing; impact strength