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 |