Specific features of polymer segregation

Segregation effects are also important for fundamental studies. For each demixing process there is a critical point, near which certain fluctuations of concentration in the mixture become anomalously large. Essentially all the work on the theory of these effects in polymer systems has been based on mean field ideas. However in many cases critical phenomena are now known to be qualitatively different from mean field predictions. One of our tasks in this chapter is to classify the critical points some will be of the mean field type, others will be different. 

From an experimental standpoint, polymer solutions and melts show segregation effects which are often very different from what we see in binary mixtures of small molecules  

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