Effect of ion beam irradiation on palladium (II) acetyl acetonate dispersed in polymer matrix
Composites, containing different concentrations of palladium (II) acetylacetonate in polymethyl methacrylate (PMMA) matrix were prepared by vigorous mixing. PMMA was prepared by solution polymerization technique. The composites were irradiated with a 120 MeV Ni10+ beam at two different
fluences of 1×1011 and 5×1012 ions/cm2 to study ion-induced effects on their dielectric, structural properties and surface morphology. AC electrical properties of these samples were studied in the frequency range 100 Hz to 10 MHz. The dielectric permittivity/loss
shows frequency dependent behavior and it obeys the universal law of dielectric (i.e. εα fn-1) for pristine and irradiated samples at high frequency. The crystalline size and crystallinity of the composites were studied by X-ray diffraction analysis. Decrease in peak intensity after
irradiation signifies the amorphization which is also responsible for decrease in Tg as obtained by means of differential scanning calorimetry measurement. Fourier transform infrared spectra also support this result. Surface roughness increases upon irradiation as observed from scanning electron
microscopy.
Keywords: AC electrical properties; FTIR; PMMA; XRD; organometallic compound
Document Type: Research Article
Affiliations: 1: Department of Physics, M.S. University of Baroda, Vadodara, India 2: Inter University Accelerator Centre, New Delhi, India 3: UGC-DAE, CSR, University Campus, Indore, India
Publication date: 01 October 2009
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