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Abstract
Copolymers containing bis-carboxypropyltetramethyl disiloxane, 10,12-docosadiyne-1,22 dioic acid and various mesogenic diols were synthesized and investigated. Particular attention was paid to the system containing the biphenyl mesogen. Interestingly most of the copolymers displayed crystallinity at room temperature in spite of large differences in the structure and length of the repeating unit. In some cases smectic mesophases of higher order were displayed. The copolymer system containing the biphenyl mesogen displays at low compositions of diacetylenic spacer (high compositions of tetramethyldisiloxane spacer) a smectic mesophase of lower order (SA or SC) while at higher compositions of diacetylenic spacer high order smectics (SH) were displayed. No nematic mesophases were found.