Record Details

Effect of structure on solution and interfacial properties of sodium polystyrene sulfonate (NaPSS)

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Effect of structure on solution and interfacial properties of sodium polystyrene sulfonate (NaPSS)
 
Creator SEN, AK
ROY, S
JUVEKAR, VA
 
Subject controlled drug delivery
high ionic-strength
aqueous-solutions
polyelectrolyte complexes
poly(styrenesulfonate) solutions
linear polyelectrolytes
osmotic properties
surface-tension
adsorption
behavior
napss
surface tension
interfacial tension
adsorption
sulfone linkage
hydrophobicity
 
Description Sodium polystyrene sulfonate (NaPSS) is synthesized by two different methods: one using free radical polymerization of sodium styrene sulfonate and another through post-sulfonation of polystyrene. Both the solution and interfacial properties of the two polymers obtained from these two methods are different. The osmotic coefficient of free radically polymerized NaPSS is 20% higher than that of the NaPSS obtained from the post-sulfonation method. Further, the free radically polymerized NaPSS has negligible interfacial activity at both air-water and toluene-water interfaces, as compared to post-sulfonated NaPSS. The former type of NaPSS also adsorbs to a comparatively lesser extent at a solid-liquid interface. The enhanced hydrophobic character of post-sulfonated NaPSS is explained on the basis of its intrinsically lower configurational entropy that results from the formation of intramolecular sulfone linkages, whereas the free radical method gives only a linear structure. Also, the intramolecular sulfone linkage will enhance the counter-ion condensation and consequently decrease the osmotic coefficient of the post-sulfonated sample. However, it is generally difficult to predict the exact degree of intramolecular sulfone linkage that may occur, as it depends on several factors. An attempt has been made to interpret some of the experimental data in the existing literature on NaPSS, which has mostly been prepared using the post-sulfonation route. (c) 2006 Society of Chemical Industry.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-16T20:35:01Z
2011-12-26T12:55:08Z
2011-12-27T05:43:45Z
2011-08-16T20:35:01Z
2011-12-26T12:55:08Z
2011-12-27T05:43:45Z
2007
 
Type Article
 
Identifier POLYMER INTERNATIONAL, 56(2), 167-174
0959-8103
http://dx.doi.org/10.1002/pi.2154
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9617
http://hdl.handle.net/10054/9617
 
Language en