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Lightscattering and Viscosities Measurements of Dilute Solutions of Some Schiff Base Polymers

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dc.contributor.author ABDUL HAMID CHANNAR
dc.contributor.author KHALIDA PARVEEN MAHAR
dc.contributor.author MUHAMMAD YAR KHUHAWAR
dc.contributor.author SUBHAN MAJIDANO
dc.contributor.author MUHAMMAD SALEEM KHAN
dc.date.accessioned 2023-10-27T04:47:35Z
dc.date.available 2023-10-27T04:47:35Z
dc.date.issued 2010-04-05
dc.identifier.citation Channar, A. H., Mahar, K. P., Khuhawar, M. Y., Majidano, S. A., & Khan, M. S. (2010). Lights cattering and Viscosities Measurements of Dilute Solutions of Some Schiff Base Polymers. J. Chem. Soc. Pak, 32(2), 201. en_US
dc.identifier.issn 0253-5106
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/19882
dc.description.abstract Three Schiff base polymers polymethylene-bis(salicylaldehyde)tetramethylethlene-diimine (PMSATen), polymethylene-bis(salicylaldehyde)meso-stillbenediimine(meso-PMSAS) and poly-methylene-bis(2-hydroxyacetophenone)1,2-propylenediimine (PMHAPn) were prepared and indicated refractive index increments (dn/dc) within 0.223-0.241 at 436 nm and 0.155-0.130 at 546 nm. The data for dn/dc was obtained by extrapolating intercept of plot △n/c against concentration to zero concentration. The values of Hc/τ (τ = turbidity) were plotted against concentration and reciprocal of the intercept at zero concentration gave the molecular weight in the range of 58100-66890.The polymers were examined for reduced, intrinsic, inherent and absolute viscosities. Thermodynamic parameters as energy of activation (△Gv), heat of activation (△Hv) and entropy of activation (△Sv) of viscous flow were calculated at different temperatures. en_US
dc.description.sponsorship The chemical society of Pakistan is an approved society from the PSF. en_US
dc.language.iso en en_US
dc.publisher HEJ Research Institute of Chemistry, University of Karachi, Karachi. en_US
dc.title Lightscattering and Viscosities Measurements of Dilute Solutions of Some Schiff Base Polymers en_US
dc.type Article en_US


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