Integral equation theory for polyampholyte solutions
Abstract
We present an integral equation theory for the structure of polyampholyte solutions. We model the polymer chains as a random copolymer with positively charged A sites and negatively charged B sites. The condition of electroneutrality for the solution is maintained by incorporating explicit counterions. We find that the pair correlation function between Amonomers displays the typical correlation hole even when the fraction of Amonomers and Bmonomers is equal. Such behavior may be attributed to the local electrostatic repulsions of polyampholytes. The sequence distribution has a significant effect on the local structure of these solutions, although the longranged correlations are not affected. The pair correlation function between sites of the majority component (A) is less sensitive to the sequence information than that between sites of the minority component.
 Publication:

APS March Meeting Abstracts
 Pub Date:
 March 2004
 Bibcode:
 2004APS..MARN30004S