Mechanical properties of poly(phenylene sulfide)(PPS)/poly(ethylene-stat-glycidyl methacrylate)-graft-poly-(acrylonitrile-stat-styrene)(EGMA) blends at various testing temperatures (-50 degrees C, 25 degrees C and 150 degrees C) and EGMA contents (0, 2, 5, 10 and 20 wt.%) were investigated. Also the tensile and impact fractured surface and inner subsurface microstructures were investigated using scanning electron microscopy (SEM) and polarized optical microscopy (POM). Maximum stress and notched Izod impact test results showed that 5 wt.% EGMA inclusion exhibited higher mechanical properties than any other compositions except 20 wt.% EGMA inclusion at a 150 degrees C testing condition. POM observation of tensile tested subsurface microstructure showed that the plastic deformation bands were formed 90 degrees to the tensile direction in 80 wt.%PPS/20 wt.%EGMA blend. Average EGMA particle size increased with EGMA content, however, EGMA particle size distribution decreased up to 5 wt.% EGMA inclusion, then started to increase above this composition. SEM observation of tensile fractured 95 wt.%PPS/5 wt.%EGMA blend tested at 150 degrees C showed a more plastic deformation than any other blend compositions. From these results, it is concluded that 95 wt.%PPS/5 wt.%EGMA blend had the highest tensile and impact strength. (FC) 1998 Elsevier Science Ltd. All rights reserved.