Document Detail


Macromolecular and Morphological Evolution of Poly(Styrene Sulfonate) Complexes with Tetradecyltrimethylammonium Bromide.
MedLine Citation:
PMID:  22992169     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Macromolecular characteristics and morphology of water-soluble complexes between sodium poly(styrene sulfonate) (PSS) and tetradecyltrimethylammonium bromide have been followed as a function of surfactant-to-polymer charge ratio (S/P) to elicit possible changes in the complexation mechanism. As revealed by light scattering, shorter PSS (30 and 150 repeat units) yield multi-chain complexes while longer PSS (450 and 5000 repeat units) form single-chain species throughout 0<S/P<0.9. Irrespective of PSS chain length, the complexes exist in solution in a swollen coil conformation and undergo a compaction with S/P, but never collapse into a globule. Even when free PSS chain is too short to coil (30 repeat units), the complexes adopt a coiled conformation due to multi-chain aggregation. Morphological changes (manifested by a hypochromic shift in UV spectra of the complexes at S/P<0.5 and an increase in the local surfactant mobility observed at S/P>0.5 by ESR) strongly suggest a change in the formation mechanism of the complexes with a transition near S/P=0.5.
Authors:
Alexey Popov; Julia Zakharova; Alexander Wasserman; Mikhail Motyakin; Victor Kasaikin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-19
Journal Detail:
Title:  The journal of physical chemistry. B     Volume:  -     ISSN:  1520-5207     ISO Abbreviation:  J Phys Chem B     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101157530     Medline TA:  J Phys Chem B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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