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Thermal Mechanical and Dielectric Studies on Thin Films of Ethylene Vinyl Acetate Copolymer with Varying Concentration of Vinyl Acetate

Author(s): Kaviarasi A, Kumari MVL, Anandhavadivel A and Prabakaran AR

The Ethylene vinyl acetate, a copolymer of polyethylene (EVA) has been used for the preparation of thin films for the investigation. The films are prepared by room temperature using solvent casting method through varying the percentage of vinyl acetate content in EVA as 18%, 58% and 88%. Chloroform is used as a solvent for ethylene vinyl acetate, high-speed stirring resulting the homogenous dispersion of the molecules. The resultant thin films of EVA with 18%, 58% and 88% of VA are characterized under different characterization techniques. The Fourier Transform Infrared Spectroscopy (FTIR) confirms the functional groups present in the EVA films of varying concentrations of VA. Thermo Gravimetric Analysis (TGA) is carried out to confirm the Thermal Stability of the films with increase in VA content. The improvement in mechanical properties like Tensile Strength, Flexural Strength and Toughness with increase in vinyl acetate content is confirmed through mechanical studies. The dielectric properties are studied for all the three concentrations of vinyl acetate in EVA, which shows constant result on the value of dielectric constant at higher the vinyl acetate in EVA as 88%.

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  • Geneva Foundation for Medical Education and Research

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