Structure formation in solution : ionic polymers and colloidal particles
1. 1 Macroionic Systems and the Scope of the Book Inthepresentmonograph,wewilldiscussionicpolymersolutionsandcolloidal dispersions. When these substances are dissolved into a solvent, they produce ionicspecies havinglargemolecularweightsandtheir counterions. We knowa variety of naturally occurring i...
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| Hoofdauteurs: | , |
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| Formaat: | Livre numérique |
| Taal: | Anglais |
| Gepubliceerd in: |
Berlin, Heidelberg :
Springer Berlin Heidelberg : Springer e-books
[20..].
Cham : Springer Nature |
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| Autres localisations: | Voir dans le Sudoc |
| Edition sous un autre format: | • Structure formation in solution, ionic polymers and colloidal particles, Norio Ise, Ikuo Sogami, New York, Springer, 2005, 1 vol. (XII-350 p.), 3-540-25271-1 |
| Samenvatting: | 1. 1 Macroionic Systems and the Scope of the Book Inthepresentmonograph,wewilldiscussionicpolymersolutionsandcolloidal dispersions. When these substances are dissolved into a solvent, they produce ionicspecies havinglargemolecularweightsandtheir counterions. We knowa variety of naturally occurring ionic polymers and chemically synthesizedc- pounds. Examples of the former are nucleic acids and some proteins, which playanimportantroleinbiologicalsystems. Examplesofsyntheticionicpo- mers are polyacrylic acid (PAA), polystyrenesulfonic acid (PSS) and poly- lylamine (PAAm). PAAisahighpolymer,inwhichmacrylicacidmoleculesCH =CH(COOH) 2 arelinearlypolymerizedby covalent bonds. Thenumber mis calledthe degree 3 of polymerization and is usually of the order of 10 . When PAA is dissolved in a dissociating solvent like water, anionic macroions and counterions are produced. In the following scheme, the counterions are protons but they may + be metal cations such as Na : ? ? ? ? ?CH ? CH? ?CH ? CH? 2 2 + ? ? ? ? | ? | + mH ? COOH COO m m PAA PAA anion Counterions. PAAm is a cationic polymer and dissociates into PAAm cations and anionic counterions as shown below: ? ? ? ? ?CH ? CH? ?CH ? CH? 2 2 ? ? ? ? ? | +mHCl ? | +mCl + CH ?NH CH ?NH 2 2 2 3 m m PAAm PAAm cation Counterions. 2 1 Introduction + ? In the case of NaCl, it dissociates into Na and Cl , which both have low molecular weights. On the other hand, PAA anions and PAAm cations have 3 highmolecularweights. Ifmis10 ,onepolymerion(macroion)hasananalyt- 3 + icalchargenumberZ of10 ,whichisexceedinglylargerthan1forNa |
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| Beschrijving item: | Archives Springer e-books (Licence nationale) Archives Springer e-books (Licence nationale) |
| ISBN: | 9783540277156 |
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