BIAXIALITY PHENOMENON IN MOLECULAR-PROPERTIES OF COMB LC POLYMER WITHLATERAL STRUCTURE - FIRST EVIDENCE

Dynamooptical and electrooptical properties have been investigated in dilute solutions for comb-like LC polymer with mesogenic groups latera lly attached by middle point to the macromolecule backbone via flexibl e spacer. For polymer solution in chloroform, the T-range was found wh ere the Kerr constant K is increasing (in absolute value) with increas ing T while the shear optical coefficient [n]/[eta] remains invariable . This reflects the intramolecular parking of the mesogen dipole axes with keeping the same order in mesogen optical axes. Dipole axis of th e mesogenic group in the chain of this polymer is known to form a larg e angle with the optical one. Hence, the result can be explained by ch ange in the mesogen short axes parking with the invariable long axes o ne. By other words, as evidence for present biaxiality phenomenon in m olecular properties of the polymer.