Quantification of degradation and surface morphology of NB7 silk fibers irradiated by 8 MeV electron beam using XRD and SEM techniques

Sangappa and Asha, S. and Somashekar, R. and Sanjeev, G. (2012) Quantification of degradation and surface morphology of NB7 silk fibers irradiated by 8 MeV electron beam using XRD and SEM techniques. Fibers and Polymers, 13 (2). pp. 224-230. ISSN 1875-0052

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Abstract

NB7 silk fiber (Bombyx mori) was irradiated with the maximum dose range of 100 kGy using 8 MeV electron beam at room temperature. Irradiation effect in these fibers is quantified in terms of the changes in microstructural parameters employing X-ray diffraction line profile analysis technique. For this purpose we have used three asymmetric distribution functions for column lengths in a crystal. The decreasing trend of crystallite size values (〈N〉 as well as Ds) and crystallinity with increasing dosage of radiation clearly indicates the degradation of fiber. Of the several factors responsible for such a behavior, we presume that the chain scission of polymer network is a significant one over others and it is well pronounced here, leading to low molecular weight of the samples. This degradation is attributed to many changes in tensile properties of the polymer. Comparison of SEM photographs also confirms the X-ray results.

Item Type:	Article
Subjects:	D Physical Science > Physics
Divisions:	Department of > Physics
Depositing User:	C Swapna Library Assistant
Date Deposited:	24 Jul 2019 05:28
Last Modified:	24 Jul 2019 05:28
URI:	http://eprints.uni-mysore.ac.in/id/eprint/5492

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