An Investigation on the impact modifiers influence on the mechanical properties of PET/PA66/short glass fiber reinforced composites

The mechanical behavior of PET/PA66 blends and corresponding glass fiber reinforced composites has been investigated in the presence of the two different impact modifiers. PET/PA66 blends were prepared by lab scale twin screw extruder and PET/PA66/GF composites were prepared by another twin screw extruder equipped with glass fiber feeder. The results of PET/PA66 blends has shown that the samples strength at break was roughly equal to this parameter value in virgin PA66 but there was a significant decrease in elongation at break and specially in notched Izod impact strength. The use of the two impact modifiers has made no difference in these two properties which can be related to the lack of the convenient functional groups on the impact modifier backbones. PET/PA66/GF composites test results revealed that the impact modifiers has no positive influence on mechanical properties; however, they show efficiency in PA66/GF compounds. As strength at break of PET/PA66/GF composites is roughly equal to the PA66/GF, it would be proper to be used in different applications which is leaning on strength properties of polyamide 66....

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