Liquid crystalline cyclic polymers

Abstract

Cyclic poly(hydrogenmethylsiloxane) fractions [H(Me)SiO]x with 4 < x < 24 (x= number-average degree of polymerisation) have been prepared by a pyrolysis reaction and interacted with suitable mesogenic alkenes to form liquid crystalline cyclic polymers; some of the properties of these polymers are reported here and compared with those of their open chain analogues.