co The objective of the study was to generate degradable polypropylene nanocomposites by incorporation of pro-oxidant and different fillers like silica, silicate, and thermally reduced graphene. Graphene-based composites exhibited higher crystallinity attributed to better dispersion and high aspect ratio platelets. Graphene composites with 2.5% additive content significantly enhanced the peak degradation temperature to 464 degrees C as compared to 448 degrees C for pure polymer. The processing conditions used for the nanocomposite generation were optimum as a uniform distribution of filler particles (or platelets) was observed in the PP matrix. The tensile modulus of the graphene composite with 2.5% additive content was 80% higher than pure PP, as compared to 60 and 30% for silicate and silica mposites, respectively. Similarly, the storage modulus of the graphene nanocomposite with 1% additive content had 30% increment at 40 degrees C as compared to pure PP. PP-additive blends as well as PP nanocomposites with silica and silicate were observed to attain 100% degree of embrittlement within 6 months of UV exposure at 30 degrees C. Graphene composites, though, had delayed photo-degradation due to UV absorption by the platelets and high aspect ratio platelets acting as oxygen barrier for PP matrix, but the pro-oxidant was successful in attaining controlled degradation. POLYM. ENG. SCI., 56:1229-1239, 2016. (c) 2016 Society of Plastics Engineers