Side chain liquid crystalline composites, occurrence of interdigitated bilayer smectic C phases

Design of highly polarized achiral mesogenic composites

“…The characterization of polymer-monomer composites was described in ref. 18. Here, the results of X-ray investigations in two series of polymer-monomer composites PM6Rm-33 (varying the alkyl chain length m) and PMnR12-33 (varying the spacer length n) are reported.…”

“…For PM6R8, [10][11][12] PM6R10 and PM6R12, 17 we previously reported a smectic C2 phase in a broad temperature range and for PM6R6 we reported the simultaneous presence of smectic A and C phases. 19 After a series of detailed experiments we are most confident that we have identified the general optimized polymer-monomer ratio for the composites, for example in PM6R8-33 (33% w/w of monomer in 66% w/w of polymer), the maximum in the macroscopic polarization is realized at a monomer-polymer ratio of 2 : 1 evaluated via studying mixtures while varying the Table 1 Phase transitions ( C) and enthalpies obtained by DSC measurements for monomers 16 (kJ mol À1 ), polymers 17 (J g À1 ) and composites 18 monomer-polymer ratio. 11 The polymer-monomer ratio of 2 : 1 can be considered as an optimized one and only few exceptions from this strict value might be possible in general.…”

“…1) to observe polarization changes related to the variation in the aliphatic part of the molecular structure. The synthesis and X-ray properties of the monomers, 16 some of the polymers 17 and the polymer-monomer composites, 18 have been previously investigated and reported.…”

“…distance (d), theoretical molecular length (L), and tilt angle b at a certain temperature for monomers, 16 polymers 17 and composites18 …”