The use of the method of sterilization by gamma radiation helps in reducing microbiological contamination. The linear low density polyethylene (LLDPE) is a linear polymer chain with short chain branching. The gamma radiation has a high penetration of polymeric materials causing the scission, crosslinking, degradation in the presence of oxygen [1, 2]. In this work, the LLDPE were irradiated in 60Co gamma source with 2000 kCi of activity, in presence of air, doses of 5, 10, 20, 50 or 100 kGy, at about 5 kGy.h-1 dose rates, at room temperature. After irradiation, the samples were heated for 60 min. at 100 ºC to promote recombination and annihilation of residual radicals. In the sequence LLDPE injected samples were irradiated and characterized to identity the effects of terminal degradation, scission end crosslinking occurred in each dose. The specimens were studied using Fourier transform infrared spectroscopy (FTIR), Melt flow index, gel fraction, Differential Scanning Calorimetry (DSC), X-Ray Diffraction (DRX), Thermogravimetric Analysis (TG), Dynamic Mechanical Analysis (DMA) and rheological measurements and mechanical. There was a thermal degradation of the resin through the process of injection molding confirmed by FTIR analysis. And LLDPE injected irradiated at doses of 5, 10 or 20 kGy had the greatest tendency to scission than those at doses of 50 or 100 kGy, where predominated crosslinking consequently the effects of irradiation end injection molding were investigated in LLDPE processed (Fig. 1) [3]