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The paper reveals the simple, quick, cost effective synthesis technique of polymer based nanocomposite which provides enhanced properties than individual. In the present work, we improve a solution based method to synthesize PMMA/ZnO nanocomposite via a solution mixing method in which various ZnO nanostructures were used as a reinforcement particles in the PMMA matrix in addition to DMAc, the resulting solution is extracted as a thin films by spin coating and are subjected to Microwave radiation . The XRD, FTIR, UV, PSA, SEM, AFM revealed the structural, morphological and optical properties of the polymer nanocomposite PMMA/ZnO.