• Mahesh S S
• Prashanth K S
• M.B Nanda Prakash
• Somashekar R
• B M Nagabhushan

The metal oxide nano particles as fillers in the polymer matrix have exhibited remarkable changes in the physio-chemical properties of the polymer nano composites.The elastic modulus and hardness of the prepared polymer nanocomposites using solvent cast method were investigated using nano indentation. The different Raman modes have been studied for the prepared polymer nano composites.The optical absorption and band gap is studied by the diffused reflectance spectroscopy. The micro structural characterization has been performed using X-ray diffraction by whole powder pattern fitting method. The results indicated that nano mechanical properties like the elastic modulus and hardness of the prepared polymer nano composites were found to decrease compared to pristine PVA. The band gap of Cr2O3 nano particles estimated from the DR spectra was found to be 2.75 eV and 3.34 eV which was calculated using Kubelka-Munk function. The whole powder pattern fitting method was employed to determine micro structural parameters. This study implies the interfacial interactions between the nano particle and the PVA matrix which lead to the observed variation in the mechanical and optical properties.

Micro structure, Nano composites,Nanoindentation, Diffused Reflectance

"Nanomechanical, Optical, and Micro structural analysis of PVA/NaCl/Cr2O3 Nanocomposites", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.522-535, June 2019, Available :http://www.jetir.org/papers/JETIR1907O65.pdf

"Nanomechanical, Optical, and Micro structural analysis of PVA/NaCl/Cr2O3 Nanocomposites", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp522-535, June 2019, Available at : http://www.jetir.org/papers/JETIR1907O65.pdf