Critical phenomena and phase transition in polymer solutions.

Phase-separation Phenomena in Polymer Solutions

Critical polymer-polymer phase separation in ternary solutions.

We study polymer-polymer phase separation in a common good solvent by means of Monte Carlo simulations of the bond-fluctuation model. Below a critical, chain-length-dependent concentration, no phase separation occurs. For higher concentrations, the critical demixing temperature scales nonlinearly with the total monomer concentration, with a power law relatively close to a renormalization-group ...

Directed Polymer Melts and Quantum Critical Phenomena

The statistical mechanics of directed line-like objects, such as directed polymers in an external field, strands of dipoles in both ferroand electrorheological fluids, and flux lines in high-TC superconductors bears a close resemblance to the quantum mechanics of bosons in 2 + 1 dimensions. We show that single component and binary mixture critical phenomena in these systems are in the universal...

Dynamic critical phenomena in aqueous protein solutions.

We report our use of quasielastic light scattering to characterize concentration fluctuations in aqueous solutions of gII-crystallin along the critical isochore. We find that the wave number and temperature dependence of the average rate of decay of the concentration fluctuations are consistent with the theory for critical dynamics in binary liquid mixtures only if we allow both the background ...

Phase transition phenomena in random discrete structures

A random discrete structure is a combinatorial object, which emerges as a result of a series of random experiments; equivalently, it can be viewed as a probability space whose elements are combinatorial structures as graphs, hypergraphs, permutations etc. In many of random discrete structures a small change of parameters of the model can greatly affect its (typical) behaviour. One of the semina...