MACROHARDNESS STUDY ON CDO INCORPORATED PI COMPOSITE THIN FILMS
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Abstract
The attainment of a better understanding and improvement of microhardness properties of metalloid incorporated polymeric thin films is a task of particular scientific and economic importance. In recent years attention has been focused on incorporation of distinct class of materials having different properties and chemical structures to form organic based composite thin films. Taking this in view polyimide (PI) composite thin films incorporating Cadmium oxide (CdO) at various weight ratios were processed using Critical Crosslinking Concentration (CCC) approach. The resultant product was imidized up to 350◦C-370◦C to test the ability of the material to endure high temperatures without affecting the host matrix (PI). Thereafter, water absorption behavior of developed composite thin films was carried out to study the hygroscopic nature of PI because a fraction of moisture within composite thin film can alter its whole set of properties. Microhardness test was performed using Vickers diamond pyramidal indenter attached to Carl Zeiss NU2 universal research microscope. Tensile strength, tensile modulus and elongation were studied to obtain information about mechanical properties of composite thin films. The synergistic improvement in the composite thin films is associated with the interaction mechanism between CdO and PI, where CdO becomes dispersed and interacts within the PI matrix. to 350◦C-370◦C to test the ability of the material to endure high temperatures without affecting the host matrix (PI). Thereafter, water absorption behavior of developed composite thin films was carried out to study the hygroscopic nature of PI because a fraction of moisture within composite thin film can alter its whole set of properties. The synergic improvement in microhardness properties is due to the uniform dispersion of ITO and G60 within the PI matrix in macro/ nano dimension.References
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