Abstract
Orientational elastic deformations of nematic phase of comblike copolymers in a magnetic field were studied. The temperature dependences of birefringence Δn, order parameter S and splay elastic constant K1 were determined. It is shown that with increasing of the molar fraction of nonmesogenic component from 0 to 0.4, the parameter S depends on copolymer composition x only near the phase transition point nematic — isotropic melt, at which S decreases with increasing x. For a copolymer with x = 0.51 at all temperatures, a decrease in the order parameter is detected. In the investigated temperature range the values of constant K1 do not depend on copolymer composition. The results are compared with characteristics of thermotropic linear aromatic polyesters.
Published Version
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