Abstract

Polymer blending is widely used method for the modification of the polymeric materials. In this study, the
mechanical behavior of polyamide 66/polypropylene (PA66/PP) blends was investigated. The different blends of
PA66/PP with varying weight percentage of PP in PA66/PP were studied. The PA66/PP blends were prepared by
melt mixing using twin screw extruder followed by injection molding. The mechanical properties of blends such
as tensile strength, flexural strength, impact strength, and hardness were studied as per ASTM standards. It was
observed that 95/5 wt.% of PA66/PP has good tensile strength (61.5 N mm−2), flexural strength (94 N mm−2),
and impact strength (115 J m−2). The same mechanical properties were observed in decreasing trend for the
different proportions of PP in steps of 5 wt.% except the impact strength of the blend. The impact strength of the
blend decreased to a value of 57 J m−2 for 85/15 wt.% of PA66/PP, after further progressive addition of PP, the
strength increased. The hardness of the blends was tested as per ASTM D2240 standards. The hardness of the
blend decreased by the addition of PP into PA66. However, the addition of PP into PA66 impaired the mechanical
properties.