Effect of glycerol on structure–property relations in chitosan/poly(ethylene oxide) blended films investigated using wide-angle X-ray diffraction

Jagadish, R. S. and Raj, Baldev and Parameswara, P. and Somashekar, R. (2010) Effect of glycerol on structure–property relations in chitosan/poly(ethylene oxide) blended films investigated using wide-angle X-ray diffraction. Polymer International, 59 (7). pp. 931-936. ISSN 1097-0126

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Abstract

Abstract Polymer blending is an effective method for providing desirable polymeric materials with properties useful for the packaging industry. In the study reported, blends of chitosan/poly(ethylene oxide) (PEO) were prepared in various weight ratios with and without glycerol. Line profile analysis of the X-ray diffraction patterns of these blended films was carried out. Microstructural parameters such as crystallite size and lattice strain were determined using paracrystalline modelling of X-ray data. These values were correlated with physico-mechanical and optical properties of the chitosan/PEO blends with and without glycerol to understand the holistic behaviour of the blends. Two prominent Bragg reflections at 2θ ≈ 19° and 23° were observed in the wide-angle X-ray diffraction patterns of the glycerol-based chitosan/PEO blended films of various ratios. Interruption of PEO crystallization with chitosan results in an amorphous polymer network and hence a reduction in crystallite size by almost 97.7%. For glycerol-based blends, the crystallite size/area decreases to 94.4% of the virgin crystallite size. The X-ray profile analysis supports the results for the physico-mechanical properties of the blends. The results show that the addition of 20 wt% of glycerol results in an increase of the elongation at break by more than 150%, meaning that these chitosan/PEO films could be applied in flexible packaging. Copyright © 2010 Society of Chemical Industry

Item Type:	Article
Uncontrolled Keywords:	chitosan, poly(ethylene oxide) (PEO), glycerol, crystallite area, paracrystalline, X-ray diffraction
Subjects:	D Physical Science > Physics
Divisions:	Department of > Physics
Depositing User:	LA manjunath user
Date Deposited:	09 Jul 2019 10:14
Last Modified:	21 Dec 2020 05:14
URI:	http://eprints.uni-mysore.ac.in/id/eprint/5012

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