| Macromolecular and Morphological Evolution of Poly(Styrene Sulfonate) Complexes with Tetradecyltrimethylammonium Bromide. | |
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MedLine Citation:
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PMID: 22992169 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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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. |
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Authors:
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Alexey Popov; Julia Zakharova; Alexander Wasserman; Mikhail Motyakin; Victor Kasaikin |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-9-19 |
Journal Detail:
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Title: The journal of physical chemistry. B Volume: - ISSN: 1520-5207 ISO Abbreviation: J Phys Chem B Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-9-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101157530 Medline TA: J Phys Chem B Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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