Norio Ise, Ikuo Sogami

Structure Formation in Solution (eBook, PDF)

Ionic Polymers and Colloidal Particles

• Format: PDF

Produktbeschreibung

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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Produktdetails

• Verlag: Springer Berlin Heidelberg
• Seitenzahl: 350
• Erscheinungstermin: 10. November 2005
• Englisch
• ISBN-13: 9783540277156
• Artikelnr.: 37369753

Autorenporträt

Norio Ise, Tokyo, Japan / Ikuo Sogami, Kyoto Sangyo University, Kyoto, Japan

Inhaltsangabe

Effective Interactions between Macroions 1.- Dilute Solutions of Flexible and Spherical Ionic Polymers.- Colloidal Dispersions.- Kikuchi-Kossel Line Analysis on Colloidal Crystals.- Effective Interactions between Macroions 2.- Viscometric Properties of Dilute Ionic Polymer Solutions and Colloidal Dispersions.- Phase Transitions by Computer Simulation.- Further Problems of Interparticle Interaction.

Rezensionen

"He found a promising approach in Sogami and Ise's treatments of 'electrostatic interactions in macro-ionic solutions' of spherical macro-ions (Ise and Sogami, 2005)."

Clays and Clay Minerals, Vol. 54, No. 6, 773-775, 2006