Structure Formation in Solution: Ionic Polymers and Colloidal Particles - Norio Ise - Grāmatas - Springer-Verlag Berlin and Heidelberg Gm - 9783540252719 - 2005. gada 22. jūlijs
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Norio Ise
Structure Formation in Solution: Ionic Polymers and Colloidal Particles 2005 edition

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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 .

350 pages, 28 black & white tables, biography

Mediji Grāmatas     Hardcover Book   (Grāmata ar cieto muguriņu un vāku)
Izlaists 2005. gada 22. jūlijs
ISBN13 9783540252719
Izdevēji Springer-Verlag Berlin and Heidelberg Gm
Lapas 350
Izmēri 155 × 235 × 21 mm   ·   684 g
Valoda Angļu   Vācu  

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