Phase diagram of diblock polyampholyte solutions

Martin Castelnovo; J. F. Joanny

doi:10.1021/ma012097v

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arXiv · cond-mat/0112181

Phase diagram of diblock polyampholyte solutions

Martin Castelnovo·J. F. Joanny

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Abstract

We discuss in this paper the phase diagram of a diblock polyampholyte solution in the limit of high ionic strength as a function of concentration and charge asymmetry. This system is shown to be very similar to solutions of so-called charged-neutral diblock copolymers: at zero charge asymmetry the solution phase separates into a polyelectrolyte complex and almost pure solvent. Above a charge asymmetry threshold, the copolymers are soluble as finite size aggregates. Scaling laws of the aggregates radius as a function of pH of the solution are in qualitative agreement with experiments.

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Martin Castelnovo, J. F. Joanny. 2001-12-11. Phase diagram of diblock polyampholyte solutions. https://doi.org/10.1021/ma012097v

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