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Title: Nano scale free volume study of high energy (MeV) ion beam irradiated polyamide nylon-6 polymer
Authors: Kumar, Rajesh
Keywords: Ion beam modification;Polyamide nylon-6 polymer;Positron annihilation lifetime;Nano scale voids;Free volume
Issue Date: Apr-2010
Publisher: CSIR
Abstract:  Characterization of the effect of energetic high energy heavy ion irradiation on free-volume parameters in polyamide nylon-6 polymer has been studied by positron annihilation lifetime measurements. The irradiation of polymeric materials with Swift Heavy Ions (SHI) results in to the change of their free volume properties which have strong correlation with their macroscopic properties. Positron Annihilation Lifetime Spectroscopy (PALS) provides direct information about the dimension, content and hole size distribution of free volume in polymers. Polyamide nylon-6 polymer films of thickness 250 μm were irradiated with 145 MeV Ne6+ ion beam at Variable Energy Cyclotron Centre (VECC), Kolkata, India to the fluences of 1011, 1012, 1013 ions/cm2. From the o-Ps parameters, average free volume hole radius, micro-void volume and fractional free volume were obtained. The values of o-Ps lifetime and therefore, the average free volume are found to decrease with ion fluences.
Page(s): 233-239
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.48(04) [April 2010]

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