Phase equilibria in polymer/solvent systems, 8. Swelling of chemically crosslinked polymers in mesogenic substances in different states

Swelling curves of chain end-linked polyurethane networks in mesogenic swelling agents were determined gravimetrically. Different slopes of the swelling curves are observed above and below the transition temperature of the liquid-crystalline to the isotropic state. From the sign of the slope it can be derived that the swelling agent is not in the liquid-like state in the gel if the pure swelling agent is liquid-crystalline.