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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|
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.
|ISSN: ||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.48(04) [April 2010]|
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