ASSOCIATION OF MESOGENIC 2-RING MOLECULES IN THE FREE AND MACROCHAIN-BOUND STATES IN SOLUTION

Temperature dependences of the hydrodynamic properties of three combli ke liquid-crystalline poly(phenylbenzoatemethylsiloxanes) containing a lkyl spacers with 4-7 carbon atoms the side chains, the molecular mass es of mobile particles in the solutions of these polymers, and analogo us properties of the low-molecular-mass compounds modeling their side chains were determined by the methods of viscometry, translational dif fusion, and sedimentation analysis. Dilute solutions of these compound s in benzene at temperatures below 26 degrees C exhibit a temperature- reversible aggregation of molecules. The most stable dimers and trimer s were observed for the molecules possessing longest aliphatic ''tails '' and spacers.