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Studies on Morphological Parameters, Radius of Gyration, Correlation Length and Invariant of HPMC Polymer Doped with Ferrous (II) Oxide Using SAXS Method

Gayathri G1, Ranjitha K2, Mahadevaiah3, V Annadurai4*, S R Kumaraswamy5, H Somashekarappa6, R Somashekar7

1Department of Physics and Research Centre, Sambhram Institute of Technology, Bangalore -560 097, India

2Department of Physics, Nitte Meenakshi Institute of Technology, Bangalore -560 064, India

3Department of Polymer, Polymer Science, Sir M.V.P.G Center, Mandya, India

4Department of Physics, NIE First Grade College, University of Mysore, Mysuru-570 008, India

5Department of Physics, Maharani’s Science College for Women, Mysuru, India

6Department of Physics, Yuvaraja′s College, Mysuru, India

7Regional Institute of Education and Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru-570 006, India

*Corresponding Author: V Annadurai, NIE First Grade College, University of Mysore, Mysuru-570 008, India; Tel: 9986121645; Email: [email protected]

Received Date: February 27, 2023

Publication Date: March 28, 2023

Citation: Gayathri G, et al. (2023). Studies on Morphological Parameters, Radius of Gyration, Correlation Length and Invariant of HPMC Polymer Doped With Ferrous(II) Oxide Using SAXS Method. Catalysis Research. 3(1):07.

Copyright: Gayathri G, et al. © (2023). 


It shed light on morphological parameters which influence radius of gyration, correlation length and invariant of Hydroxy Propyl Methyl Cellulose (HPMC) polymer doped with ferrous (II) oxide (FeO) using small angle X-ray scattering (SAXS) method. SAXS patterns have been recorded for different composition and gives an information about the structure of the polymer on a scale of about 800Ǻ, in which the variation of scattered intensity with angles from 0o to 2.5o has been measured for different composition of FeO with host polymer of HPMC. Employing para-crystalline model and exponential distribution function of phase lengths (amorphous and crystalline), we find a good agreement between the measured and predicted scattering except for a very small range of angles on the low angle side of the peak intensity. The method enabled quantitative parameters describing morphology of the two phases, amorphous and crystalline, consistent with the SAXS intensity distribution. A stepping procedure has been employed to compute the final parameters which gave the best fit between the calculated and experimental data. This was done by minimizing the statistical goodness-of-fit parameter chi-square. It is observed that there are significant changes in distribution of phase lengths due to different percentage weight of FeO in HPMC contents. Additionally, SAXS data has been used to estimate (i) radius of gyration (Rg), ii) correlation length (Lcor) and (iii) invariant (Q) parameters. A functional representation of the long period and also radius of gyration at different dopant concentrations is adopted by viewing them as realizations of a continuous-time stochastic process observed with measurement error. This allows one to estimate the mean functional relationship between long period and the dopant concentration.

Keywords: Morphological parameters, HPMC, Ferrous oxide, SAXS method, Phase lengths, Radius of gyration

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