The effects of flow orientation and shear rate on the mechanical properties and crystalline morphology of polypropylene were studied in this thesis. Material was injection molded into a drawer part at injection rates ranging from 1.5 – 9 in/s, and tensile specimens were cut from the parts to evaluate the mechanical properties. The tensile tests on these samples verified that flow orientation has a drastic effect on the strain to break of the polypropylene, while not having a significant effect on the Young’s modulus and yield strength. The injection rate had an effect on the yield strength and the strain to break in the flow direction. These physical tests were also supported by modeling the injection molding using Autodesk Moldflow® software. Differential scanning calorimetry was run on the samples to evaluate if the additional shear was having any effect on the degree of crystallinity of the polymer. However, all tests resulted in a similar degree of crystallinity. Next, polarized optical microscopy and scanning electron microscopy were utilized to evaluate any morphological changes in the material as a function of injection rate. The optical microscopy showed that there were distinct shear regions occurring in the parts. While the scanning electron microscopy provided some promising images, definitive scans of the morphology were not able to be obtained within the timeframe of this work due to issues with the etching procedure.