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This experimental study investigated the modification of optical, structural and morphological properties of Makrofol‐KG and Polyethylene Terephtalate (PET) by irradiation of 120 MeV Ni+9 ions at fluences ranging from 1 × 1010 to 1 × 1012 ion/cm2. Optical and structural properties were studied by UV–visible spectroscopy and X‐ray diffraction (XRD) method, respectively. XRD studies of pristine and irradiated polymers revealed that crystallinity decreased after irradiation with swift heavy ions. The UV–visible spectrum displayed a shift in absorbance edge toward higher wavelength at higher fluence, which can be correlated with transition involved in polymers. Fourier transform infrared spectroscopy spectra were analyzed to investigate the changes in the chemical/structural properties of these polymers. The Makrofol‐KG is found to exhibit more pronounced modification compared to PET after irradiation by swift heavy ions. The surface morphology studied by atomic force microscopy showed that the roughness of polymers surface increased with increasing fluence. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

The paper presents the hydrophilic modification of polyvinylidene fluoride (PVDF) membranes under swift heavy ion (SHI) irradiation. The research work included the irradiation of PVDF membranes of 9 μm thicknesses with 50 MeV Ni ions at fluences of 1 × 10 13 and 5 × 10 13 ion cm −2 . The pristine and irradiated membranes have been investigated by means of Fourier transform infrared spectroscopy, atomic force microscopy, scanning electron microscope and water contact angle measurement. It is observed that porosity, grain size and surface roughness of the membranes increase after ion irradiation and the water contact angle on irradiated sample decreases as compared to the pristine sample, indicating the development of a highly hydrophilic surface. The energy transferred by energetic ions to the PVDF membranes initiated the crosslinking and chain scission. The crosslinking and chain scission increase the roughness of PVDF surface which develops highly hydrophilic PVDF membranes after SHI irradiation.

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