The paper discusses the effect of manganese (ІІІ) acetate in the degradation of low density polyethylene (LDPE). Stearic acid has been used as a dispersion promoter to circumvent non-uniform dispersion of inorganic compound like manganese (ІІІ) acetate in LDPE. A detailed study has been made to investigate the effect of dispersion promoter on degradation of LDPE. The combined effect of dispersion promoter and manganese (ІІІ) acetate has been studied in accelerated aging of LDPE. Masked degradation of LDPE has been noted in presence of natural rubber (NR). The degradation processes of LDPE eventually have been observed to follow different mechanistic pathways in presence of dispersion promoter and transitional metal catalyst. At an optimized condition of time and temperature, LDPE has been found to be degraded into a semi-solid state in combined presence of manganese (ІІІ) acetate and the dispersion promoter. The Arrhenius equation has been adopted to predict the life time of the LDPE having different amount of manganese (III) acetate.