Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )
Ghazy, A., Shaheen, M., Kenawy, E., El-Mekawy, F. (2016). Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS ). EKB Journal Management System, 37(2), 112-118. doi: 10.21608/djs.2016.139927
A. R. Ghazy; M. Shaheen; El-Refaie Kenawy; F. El-Mekawy. "Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )". EKB Journal Management System, 37, 2, 2016, 112-118. doi: 10.21608/djs.2016.139927
Ghazy, A., Shaheen, M., Kenawy, E., El-Mekawy, F. (2016). 'Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )', EKB Journal Management System, 37(2), pp. 112-118. doi: 10.21608/djs.2016.139927
Ghazy, A., Shaheen, M., Kenawy, E., El-Mekawy, F. Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS ). EKB Journal Management System, 2016; 37(2): 112-118. doi: 10.21608/djs.2016.139927

Determination of Chitosan Scattering Parameters by Using Multi Angle Static Laser Light Scattering(MASLLS )

Delta Journal of Science
Article 2, Volume 37, Issue 2, December 2016, Page 112-118  XML PDF (1.4 MB)
Document Type: Research and Reference
DOI: 10.21608/djs.2016.139927
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Authors
A. R. Ghazy1; M. Shaheen2; El-Refaie Kenawy3; F. El-Mekawy1
1Laser Laboratory, Physics department, Faculty of sciences, Tanta University, Tanta, Egypt
2Laser Laboratory, Physics department, Faculty of sciences, Tanta University, Tanta,
3Polymer Research group, Chemistry Department, Faculty of Sciences, Tanta University, Tanta, Egypt
Abstract
Measurement of polymer characteristics by using the static laser light scattering experiment needs a precise
determination of its refractive index increment, dn/dc. Through the dependence of Rayleigh scattering coefficient on the square
value of the refractive index increment(dn/dc)2. The average molecular weight of the investigated polymer is determined using a
home built of Mach-Zehender Interferometer(MZI) which has been constructed to measure the refractive index, n, of Chitosan at
different concentration ranging from 0.002 to 0.008 gm/L. The measurements are carried out through the dependence of fringe
numbers on the laser incidence angle of polymer’s solutions. The used laser beam is a He-Ne laser with 543 nm wavelength and
2mw in power (from Meridith). The obtained value of dn/dc is 0.198011 L/gm . A static laser light scattering(SLLS) experiment
is constructed in our lab to measure the angular distribution of the scattered laser light intensity. From which the Rayleigh ratio
Rθ, molecular weight MW, second virial coefficient A2 and the square radius of gyration <RG
2> are calculated through what is
called as Zimm plot method .
Keywords
Refractive index increment; Mach-Zehender interferometer; Static laser light scattering; Molecular weight; Second virial coefficient; and Radius of gyration
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