The toughening of glass fiber reinforced nylon‐6,6 (PA‐6,6) by using the functionalized triblock copolymer styrene‐(ethylene‐co‐butylene)‐styrene, grafted with maleic anhydride (SEBS‐g‐MA) was examined. Blends containing 2.5, 5, 7.5, 10, and 12.5 wt% copolymer were prepared by melt blending in a single‐screw extruder. Emphasis was given to the study of mechanical properties in comparison with morphology and thermal properties of the aforementioned samples. Although the amount of SEBS‐g‐MA that was added in PA‐6,6 was not enough to produce a super‐tough material, a significant increase in the resistance to crack propagation and impact strength was observed in all blends. This behavior was proportional to the amount of SEBS‐g‐MA that was added for samples having up to 10%, rubber, while additional amounts seem to have no further effect. A small decrease in tensile strength was also observed. From FTIR spectroscopy and DSC analysis it was shown that the grafting extent of SEBS‐g‐MA to PA‐6,6 was very low.
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Karayannidis et al. (2002) studied this question.
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