Polyampholytes: From single chains to solutions

Macromolecules

Volumn 30, Issue 26, 1997, Pages 8478-8498

  Everaers, R ^a,b   Johner, A ^a   Joanny, J F ^a  

^a INSTITUT CHARLES SADRON   (France)

^b INSTITUT CURIE   (France)

Author keywords

[No Author keywords available]

Indexed keywords

COMPOSITION EFFECTS; PHASE SEPARATION; PRECIPITATION (CHEMICAL); SOLUTIONS;

MULTICHAIN EFFECTS; POLYAMPHOLYTES; UNIMERS;

POLYELECTROLYTES;

EID: 0031361990     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma970947u     Document Type: Article

References (32)

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18. dense/ga) with a typical net charge |z| = √fga.
19. ex(δf,Ñ) i.e., dimer formation is strongly prohibited.
20. a is the number of charges per blob and, in general, much larger than 1.
21. Here we assume that the precipitate contains only a negligible fraction of counterions and therefore equal amounts of chains with positive and negative net charge. This is reasonable until the concentrations in the supernatant exceed the limit eq 3.17.
22. Equation 3.3 is correct only as long as the counterions and the excess chains do not start to precipitate into the dense phase. In this section we estimate the validity range from the asymptotic case where the total concentration is so high that precipitate and sample composition become identical (see eq 3.17). The crossover will be treated in more detail for the example in the following section.
23. In light of our results for bimodal distributions, it seeme reasonable to neglect higher order clusters for (almost) symmetric charge distributions.
24. It is not obvious that the negatively charged chains should have equal charges δf̃/2, but other combinations only make the problem more complicated without changing the basic physics.
25. As in the case of dimers the trimer free energy dominates and leads to the formation of predominantly neutral complexes.
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31. 2/3; i.e., within the validity range of the Debye-Hückel theory, the globules can indeed be regarded as point-like.
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