Hysteretic behavior of a polymer molecule immersed in an incompatible melt
Cyprien Gay, Elie Raphael
Abstract
The radius of gyration of a polymer chain immersed in a low molecular weight solvent is known to vary monotonically with the solvent quality. Here, we consider the behavior of a chain immersed in a high molecular weight solvent (polymer melt). Unsurprisingly, we find that, as the incompatibility between the chain and the polymer melt is increased, the two limiting conformations of the chain are the ideal random coil (R = aN1/2) and the dense globule (R = aN1/3). We show, however, that between these two limits the radius of gyration of the chain presents a hysteretic behavior .
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