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PMMA-ZnO nanocomposites were synthesized with different percent weight compositions of as synthesized ZnO nanoparticles (2%, 2.5%, 3.5%. 4.5% and 5% w/w). Further their structural and optical properties were investigated using XRD, SEM and UV–vis spectrophotometer. No significant peak of ZnO crystalline phase in all the samples of PMMA-ZnO nanocomposites was observed in XRD study which refers the complete dispersion of it within the solution and confirms the formation of nanocomposites. However, UV–vis spectroscopy study shows an intense absorbtion at wavelength 377 nm in all samples of PMMA-ZnO nanocomposites of various weight percent compositions and its absorbance increases with increase in the percent weight composition of nanofiller in the nanocomposites which attributes the presence of ZnO nanoparticles. FESEM study reveals the uniform distribution of ZnO nanoparticles with …