Structure and thermodynamics of associating rods solutions

Details Structure and thermodynamics of associating rods solutions Structure and thermodynamics of associating rods solutions

2002-11-21

arxiv.org/abs/cond-mat/0211494v1

Physics

Condensed Matter

Scientific paper

Thermoreversible sol-gel transitions in solutions of rod-like associating polymers are analyzed by computer simulations and by mean field models. The sol-gel transition is determined by the divergence of the cluster weight average. The analytically determined sol-gel transition is in good agreement with the simulation results. At low temperatures we observe a peak in the heat capacity, which maximum is associated with the precipitation transition. The gelation transition is sensitive to the number of associating groups per rod but nearly insensitive to the spatial distribution of associating groups around the rod. The precipitation is strongly dependent on both the number and distribution of associating groups per rod. We find negligible nematic orientational order at the gelation and precipitation transitions.

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