ABS TERNARY BLENDS - MORPHOLOGY, SURFACE GLOSS, AND MECHANICAL-PROPERTIES

ABS/PMMA/PC adiene-styrene)/poly(methylmethacrylate)/bisphenol A polyc arbonate) and ABS/PMMA/phenoxy ternary blends were prepared using a co rotating twin-screw extruder, where the ABS content was fixed at 60% b y weight, and the other ingredients varied 0 similar to 40%. Tensile m odulus, yield strength, elongation at break, and notched impact streng th varied linearly with compositions in ABS/PMMA/phenoxy blends, where as positive synergisms of these properties were generally obtained wit h ABS/PMMA/PC blends. The results were interpreted in terms of interpo sitions of PMMA between ABS and PC, which were seen from the TEM micro graphs and predicted from the spreading coefficient. Surface gloss of ABS increased in ABS/PMMA(60/40) blend but decreased in ternary blends , and this phenomenon was possibly explained by the pearl gloss mechan ism.