Network chain — continued length distribution

In the semidilute regime, the molecules cannot distribute themselves at random over the volume. The polymer concentration fluctuates with a wavelength equal to the correlation length. The system can be seen as a kind of network with mesh size comparable to The network continuously changes conformation due to Brownian motion. Over distances along the polymer chain < , which implies short time scales for molecular motion, polymer sub-chains behave as in a dilute solution interactions between two... 

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